Finding the Fourth Proportional to 165,986.52, 229,061.36 and 90,535

Step by Step Solution

1. Step 1: Write the proportion equation
   165,986.52 : 229,061.36 = 90,535 : x
2. Step 2: Convert to fraction form
   165,986.52/229,061.36 = 90,535/x
3. Step 3: Cross multiply
   165,986.52x = 229,061.36 × 90,535
4. Step 4: Simplify right side
   165,986.52x = 20,738,070,227.60
5. Step 5: Solve for x
   x = 20,738,070,227.60/165,986.52
6. Step 6: Final answer
   x = 124,938.28