Finding the Fourth Proportional to 78,116,550.99, 117,179,698.37 and 20,608,877.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,116,550.99 : 117,179,698.37 = 20,608,877.31 : x
2. Step 2: Convert to fraction form
   78,116,550.99/117,179,698.37 = 20,608,877.31/x
3. Step 3: Cross multiply
   78,116,550.99x = 117,179,698.37 × 20,608,877.31
4. Step 4: Simplify right side
   78,116,550.99x = 2,414,942,026,827,092.50
5. Step 5: Solve for x
   x = 2,414,942,026,827,092.50/78,116,550.99
6. Step 6: Final answer
   x = 30,914,601.27