Finding the Fourth Proportional to 109,905.86, 151,665.72 and 62,169.12

Step by Step Solution

1. Step 1: Write the proportion equation
   109,905.86 : 151,665.72 = 62,169.12 : x
2. Step 2: Convert to fraction form
   109,905.86/151,665.72 = 62,169.12/x
3. Step 3: Cross multiply
   109,905.86x = 151,665.72 × 62,169.12
4. Step 4: Simplify right side
   109,905.86x = 9,428,924,113.43
5. Step 5: Solve for x
   x = 9,428,924,113.43/109,905.86
6. Step 6: Final answer
   x = 85,790.91