Finding the Fourth Proportional to 13,100.52, 18,079.37 and 7,724.55

Step by Step Solution

1. Step 1: Write the proportion equation
   13,100.52 : 18,079.37 = 7,724.55 : x
2. Step 2: Convert to fraction form
   13,100.52/18,079.37 = 7,724.55/x
3. Step 3: Cross multiply
   13,100.52x = 18,079.37 × 7,724.55
4. Step 4: Simplify right side
   13,100.52x = 139,654,958.91
5. Step 5: Solve for x
   x = 139,654,958.91/13,100.52
6. Step 6: Final answer
   x = 10,660.26