Finding the Fourth Proportional to 116,712.53, 161,061.17 and 65,725.05

Step by Step Solution

1. Step 1: Write the proportion equation
   116,712.53 : 161,061.17 = 65,725.05 : x
2. Step 2: Convert to fraction form
   116,712.53/161,061.17 = 65,725.05/x
3. Step 3: Cross multiply
   116,712.53x = 161,061.17 × 65,725.05
4. Step 4: Simplify right side
   116,712.53x = 10,585,753,122.68
5. Step 5: Solve for x
   x = 10,585,753,122.68/116,712.53
6. Step 6: Final answer
   x = 90,699.38