Finding the Fourth Proportional to 103,665.30, 155,267.55 and 89,841.30

Step by Step Solution

1. Step 1: Write the proportion equation
   103,665.30 : 155,267.55 = 89,841.30 : x
2. Step 2: Convert to fraction form
   103,665.30/155,267.55 = 89,841.30/x
3. Step 3: Cross multiply
   103,665.30x = 155,267.55 × 89,841.30
4. Step 4: Simplify right side
   103,665.30x = 13,949,438,539.82
5. Step 5: Solve for x
   x = 13,949,438,539.82/103,665.30
6. Step 6: Final answer
   x = 134,562.27