Finding the Fourth Proportional to 13,124.97, 18,109.35 and 7,747.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,124.97 : 18,109.35 = 7,747.61 : x
2. Step 2: Convert to fraction form
   13,124.97/18,109.35 = 7,747.61/x
3. Step 3: Cross multiply
   13,124.97x = 18,109.35 × 7,747.61
4. Step 4: Simplify right side
   13,124.97x = 140,304,090.61
5. Step 5: Solve for x
   x = 140,304,090.61/13,124.97
6. Step 6: Final answer
   x = 10,689.86