Finding the Fourth Proportional to 141,632.52, 212,342.65 and 85,459.35

Step by Step Solution

1. Step 1: Write the proportion equation
   141,632.52 : 212,342.65 = 85,459.35 : x
2. Step 2: Convert to fraction form
   141,632.52/212,342.65 = 85,459.35/x
3. Step 3: Cross multiply
   141,632.52x = 212,342.65 × 85,459.35
4. Step 4: Simplify right side
   141,632.52x = 18,146,665,428.91
5. Step 5: Solve for x
   x = 18,146,665,428.91/141,632.52
6. Step 6: Final answer
   x = 128,124.99