Finding the Fourth Proportional to 13,442.01, 18,548.56 and 7,472.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,442.01 : 18,548.56 = 7,472.71 : x
2. Step 2: Convert to fraction form
   13,442.01/18,548.56 = 7,472.71/x
3. Step 3: Cross multiply
   13,442.01x = 18,548.56 × 7,472.71
4. Step 4: Simplify right side
   13,442.01x = 138,608,009.80
5. Step 5: Solve for x
   x = 138,608,009.80/13,442.01
6. Step 6: Final answer
   x = 10,311.55