Finding the Fourth Proportional to 155,090.60, 231,585.31 and 123,142.17

Step by Step Solution

1. Step 1: Write the proportion equation
   155,090.60 : 231,585.31 = 123,142.17 : x
2. Step 2: Convert to fraction form
   155,090.60/231,585.31 = 123,142.17/x
3. Step 3: Cross multiply
   155,090.60x = 231,585.31 × 123,142.17
4. Step 4: Simplify right side
   155,090.60x = 28,517,918,635.90
5. Step 5: Solve for x
   x = 28,517,918,635.90/155,090.60
6. Step 6: Final answer
   x = 183,879.09