Finding the Fourth Proportional to 13,385.81, 18,472.30 and 7,417.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,385.81 : 18,472.30 = 7,417.32 : x
2. Step 2: Convert to fraction form
   13,385.81/18,472.30 = 7,417.32/x
3. Step 3: Cross multiply
   13,385.81x = 18,472.30 × 7,417.32
4. Step 4: Simplify right side
   13,385.81x = 137,015,018.05
5. Step 5: Solve for x
   x = 137,015,018.05/13,385.81
6. Step 6: Final answer
   x = 10,235.84