Finding the Fourth Proportional to 78,116,227.29, 117,179,212.50 and 20,608,553.81

Step by Step Solution

1. Step 1: Write the proportion equation
   78,116,227.29 : 117,179,212.50 = 20,608,553.81 : x
2. Step 2: Convert to fraction form
   78,116,227.29/117,179,212.50 = 20,608,553.81/x
3. Step 3: Cross multiply
   78,116,227.29x = 117,179,212.50 × 20,608,553.81
4. Step 4: Simplify right side
   78,116,227.29x = 2,414,894,105,633,778.50
5. Step 5: Solve for x
   x = 2,414,894,105,633,778.50/78,116,227.29
6. Step 6: Final answer
   x = 30,914,115.92