Finding the Fourth Proportional to 13,100.57, 18,079.23 and 7,132.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,100.57 : 18,079.23 = 7,132.47 : x
2. Step 2: Convert to fraction form
   13,100.57/18,079.23 = 7,132.47/x
3. Step 3: Cross multiply
   13,100.57x = 18,079.23 × 7,132.47
4. Step 4: Simplify right side
   13,100.57x = 128,949,565.60
5. Step 5: Solve for x
   x = 128,949,565.60/13,100.57
6. Step 6: Final answer
   x = 9,843.05