Finding the Fourth Proportional to 103,699.30, 155,318.55 and 89,875.30

Step by Step Solution

1. Step 1: Write the proportion equation
   103,699.30 : 155,318.55 = 89,875.30 : x
2. Step 2: Convert to fraction form
   103,699.30/155,318.55 = 89,875.30/x
3. Step 3: Cross multiply
   103,699.30x = 155,318.55 × 89,875.30
4. Step 4: Simplify right side
   103,699.30x = 13,959,301,276.82
5. Step 5: Solve for x
   x = 13,959,301,276.82/103,699.30
6. Step 6: Final answer
   x = 134,613.26