Finding the Fourth Proportional to 323,672.90, 485,655.15 and 155,128.10

Step by Step Solution

1. Step 1: Write the proportion equation
   323,672.90 : 485,655.15 = 155,128.10 : x
2. Step 2: Convert to fraction form
   323,672.90/485,655.15 = 155,128.10/x
3. Step 3: Cross multiply
   323,672.90x = 485,655.15 × 155,128.10
4. Step 4: Simplify right side
   323,672.90x = 75,338,760,674.72
5. Step 5: Solve for x
   x = 75,338,760,674.72/323,672.90
6. Step 6: Final answer
   x = 232,762.03