Finding the Fourth Proportional to 13,385.34, 18,472.51 and 7,416.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,385.34 : 18,472.51 = 7,416.88 : x
2. Step 2: Convert to fraction form
   13,385.34/18,472.51 = 7,416.88/x
3. Step 3: Cross multiply
   13,385.34x = 18,472.51 × 7,416.88
4. Step 4: Simplify right side
   13,385.34x = 137,008,422.33
5. Step 5: Solve for x
   x = 137,008,422.33/13,385.34
6. Step 6: Final answer
   x = 10,235.70