Finding the Fourth Proportional to 13,422.50, 18,523.30 and 7,454.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,422.50 : 18,523.30 = 7,454.72 : x
2. Step 2: Convert to fraction form
   13,422.50/18,523.30 = 7,454.72/x
3. Step 3: Cross multiply
   13,422.50x = 18,523.30 × 7,454.72
4. Step 4: Simplify right side
   13,422.50x = 138,086,014.98
5. Step 5: Solve for x
   x = 138,086,014.98/13,422.50
6. Step 6: Final answer
   x = 10,287.65