Finding the Fourth Proportional to 99,685.37, 137,564.10 and 54,363.71

Step by Step Solution

1. Step 1: Write the proportion equation
   99,685.37 : 137,564.10 = 54,363.71 : x
2. Step 2: Convert to fraction form
   99,685.37/137,564.10 = 54,363.71/x
3. Step 3: Cross multiply
   99,685.37x = 137,564.10 × 54,363.71
4. Step 4: Simplify right side
   99,685.37x = 7,478,494,150.99
5. Step 5: Solve for x
   x = 7,478,494,150.99/99,685.37
6. Step 6: Final answer
   x = 75,020.98