Finding the Fourth Proportional to 51,468,642.72, 77,217,906.18 and 20,747,367.72

Step by Step Solution

1. Step 1: Write the proportion equation
   51,468,642.72 : 77,217,906.18 = 20,747,367.72 : x
2. Step 2: Convert to fraction form
   51,468,642.72/77,217,906.18 = 20,747,367.72/x
3. Step 3: Cross multiply
   51,468,642.72x = 77,217,906.18 × 20,747,367.72
4. Step 4: Simplify right side
   51,468,642.72x = 1,602,068,294,084,920.50
5. Step 5: Solve for x
   x = 1,602,068,294,084,920.50/51,468,642.72
6. Step 6: Final answer
   x = 31,127,074.84