Finding the Fourth Proportional to 13,385.28, 18,471.81 and 7,417.02

Step by Step Solution

1. Step 1: Write the proportion equation
   13,385.28 : 18,471.81 = 7,417.02 : x
2. Step 2: Convert to fraction form
   13,385.28/18,471.81 = 7,417.02/x
3. Step 3: Cross multiply
   13,385.28x = 18,471.81 × 7,417.02
4. Step 4: Simplify right side
   13,385.28x = 137,005,784.21
5. Step 5: Solve for x
   x = 137,005,784.21/13,385.28
6. Step 6: Final answer
   x = 10,235.56