Finding the Fourth Proportional to 12,651,404,552.72, 18,985,680,303.16 and 5,191,336,023.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,651,404,552.72 : 18,985,680,303.16 = 5,191,336,023.76 : x
2. Step 2: Convert to fraction form
   12,651,404,552.72/18,985,680,303.16 = 5,191,336,023.76/x
3. Step 3: Cross multiply
   12,651,404,552.72x = 18,985,680,303.16 × 5,191,336,023.76
4. Step 4: Simplify right side
   12,651,404,552.72x = 98,561,046,093,385,187,328
5. Step 5: Solve for x
   x = 98,561,046,093,385,187,328/12,651,404,552.72
6. Step 6: Final answer
   x = 7,790,522,046.99