Finding the Fourth Proportional to 165,732, 228,710.17 and 90,280.50

Step by Step Solution

1. Step 1: Write the proportion equation
   165,732 : 228,710.17 = 90,280.50 : x
2. Step 2: Convert to fraction form
   165,732/228,710.17 = 90,280.50/x
3. Step 3: Cross multiply
   165,732x = 228,710.17 × 90,280.50
4. Step 4: Simplify right side
   165,732x = 20,648,068,502.69
5. Step 5: Solve for x
   x = 20,648,068,502.69/165,732
6. Step 6: Final answer
   x = 124,587.10