Finding the Fourth Proportional to 116,401.12, 160,637.78 and 65,414.86

Step by Step Solution

1. Step 1: Write the proportion equation
   116,401.12 : 160,637.78 = 65,414.86 : x
2. Step 2: Convert to fraction form
   116,401.12/160,637.78 = 65,414.86/x
3. Step 3: Cross multiply
   116,401.12x = 160,637.78 × 65,414.86
4. Step 4: Simplify right side
   116,401.12x = 10,508,098,291.01
5. Step 5: Solve for x
   x = 10,508,098,291.01/116,401.12
6. Step 6: Final answer
   x = 90,274.89