Finding the Fourth Proportional to 13,499.28, 18,628.83 and 7,531.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,499.28 : 18,628.83 = 7,531.61 : x
2. Step 2: Convert to fraction form
   13,499.28/18,628.83 = 7,531.61/x
3. Step 3: Cross multiply
   13,499.28x = 18,628.83 × 7,531.61
4. Step 4: Simplify right side
   13,499.28x = 140,304,989.17
5. Step 5: Solve for x
   x = 140,304,989.17/13,499.28
6. Step 6: Final answer
   x = 10,393.52