Finding the Fourth Proportional to 165,980.34, 248,842.89 and 85,932.50

Step by Step Solution

1. Step 1: Write the proportion equation
   165,980.34 : 248,842.89 = 85,932.50 : x
2. Step 2: Convert to fraction form
   165,980.34/248,842.89 = 85,932.50/x
3. Step 3: Cross multiply
   165,980.34x = 248,842.89 × 85,932.50
4. Step 4: Simplify right side
   165,980.34x = 21,383,690,400.71
5. Step 5: Solve for x
   x = 21,383,690,400.71/165,980.34
6. Step 6: Final answer
   x = 128,832.67