Finding the Fourth Proportional to 123,436.15, 185,160.30 and 64,387.15

Step by Step Solution

1. Step 1: Write the proportion equation
   123,436.15 : 185,160.30 = 64,387.15 : x
2. Step 2: Convert to fraction form
   123,436.15/185,160.30 = 64,387.15/x
3. Step 3: Cross multiply
   123,436.15x = 185,160.30 × 64,387.15
4. Step 4: Simplify right side
   123,436.15x = 11,921,944,010.15
5. Step 5: Solve for x
   x = 11,921,944,010.15/123,436.15
6. Step 6: Final answer
   x = 96,583.89