Finding the Fourth Proportional to 155,111.10, 232,839.45 and 85,127.10

Step by Step Solution

1. Step 1: Write the proportion equation
   155,111.10 : 232,839.45 = 85,127.10 : x
2. Step 2: Convert to fraction form
   155,111.10/232,839.45 = 85,127.10/x
3. Step 3: Cross multiply
   155,111.10x = 232,839.45 × 85,127.10
4. Step 4: Simplify right side
   155,111.10x = 19,820,947,144.10
5. Step 5: Solve for x
   x = 19,820,947,144.10/155,111.10
6. Step 6: Final answer
   x = 127,785.49