Finding the Fourth Proportional to 12,359.31, 18,517.37 and 10,292.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,359.31 : 18,517.37 = 10,292.61 : x
2. Step 2: Convert to fraction form
   12,359.31/18,517.37 = 10,292.61/x
3. Step 3: Cross multiply
   12,359.31x = 18,517.37 × 10,292.61
4. Step 4: Simplify right side
   12,359.31x = 190,592,016.17
5. Step 5: Solve for x
   x = 190,592,016.17/12,359.31
6. Step 6: Final answer
   x = 15,420.93