Finding the Fourth Proportional to 13,147,447,131.32, 19,721,457,806.33 and 7,911,435,307.64

Step by Step Solution

1. Step 1: Write the proportion equation
   13,147,447,131.32 : 19,721,457,806.33 = 7,911,435,307.64 : x
2. Step 2: Convert to fraction form
   13,147,447,131.32/19,721,457,806.33 = 7,911,435,307.64/x
3. Step 3: Cross multiply
   13,147,447,131.32x = 19,721,457,806.33 × 7,911,435,307.64
4. Step 4: Simplify right side
   13,147,447,131.32x = 156,025,037,607,060,733,952
5. Step 5: Solve for x
   x = 156,025,037,607,060,733,952/13,147,447,131.32
6. Step 6: Final answer
   x = 11,867,325,728.62