Finding the Fourth Proportional to 8,978,561,086.56, 12,390,846,156.72 and 4,964,157,074.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978,561,086.56 : 12,390,846,156.72 = 4,964,157,074.40 : x
2. Step 2: Convert to fraction form
   8,978,561,086.56/12,390,846,156.72 = 4,964,157,074.40/x
3. Step 3: Cross multiply
   8,978,561,086.56x = 12,390,846,156.72 × 4,964,157,074.40
4. Step 4: Simplify right side
   8,978,561,086.56x = 61,510,106,606,683,627,520
5. Step 5: Solve for x
   x = 61,510,106,606,683,627,520/8,978,561,086.56
6. Step 6: Final answer
   x = 6,850,775,532.26