Finding the Fourth Proportional to 165,892.16, 228,932.52 and 90,441.20

Step by Step Solution

1. Step 1: Write the proportion equation
   165,892.16 : 228,932.52 = 90,441.20 : x
2. Step 2: Convert to fraction form
   165,892.16/228,932.52 = 90,441.20/x
3. Step 3: Cross multiply
   165,892.16x = 228,932.52 × 90,441.20
4. Step 4: Simplify right side
   165,892.16x = 20,704,931,827.82
5. Step 5: Solve for x
   x = 20,704,931,827.82/165,892.16
6. Step 6: Final answer
   x = 124,809.59