Finding the Fourth Proportional to 13,385.91, 18,472.71 and 7,417.68

Step by Step Solution

1. Step 1: Write the proportion equation
   13,385.91 : 18,472.71 = 7,417.68 : x
2. Step 2: Convert to fraction form
   13,385.91/18,472.71 = 7,417.68/x
3. Step 3: Cross multiply
   13,385.91x = 18,472.71 × 7,417.68
4. Step 4: Simplify right side
   13,385.91x = 137,024,568.33
5. Step 5: Solve for x
   x = 137,024,568.33/13,385.91
6. Step 6: Final answer
   x = 10,236.48