Finding the Fourth Proportional to 13,521.71, 18,658.61 and 7,553.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,521.71 : 18,658.61 = 7,553.25 : x
2. Step 2: Convert to fraction form
   13,521.71/18,658.61 = 7,553.25/x
3. Step 3: Cross multiply
   13,521.71x = 18,658.61 × 7,553.25
4. Step 4: Simplify right side
   13,521.71x = 140,933,094.90
5. Step 5: Solve for x
   x = 140,933,094.90/13,521.71
6. Step 6: Final answer
   x = 10,422.73