Finding the Fourth Proportional to 165,837, 228,854.86 and 90,385.50

Step by Step Solution

1. Step 1: Write the proportion equation
   165,837 : 228,854.86 = 90,385.50 : x
2. Step 2: Convert to fraction form
   165,837/228,854.86 = 90,385.50/x
3. Step 3: Cross multiply
   165,837x = 228,854.86 × 90,385.50
4. Step 4: Simplify right side
   165,837x = 20,685,160,948.53
5. Step 5: Solve for x
   x = 20,685,160,948.53/165,837
6. Step 6: Final answer
   x = 124,731.88