Finding the Fourth Proportional to 13,417.86, 18,515.70 and 7,449.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,417.86 : 18,515.70 = 7,449.42 : x
2. Step 2: Convert to fraction form
   13,417.86/18,515.70 = 7,449.42/x
3. Step 3: Cross multiply
   13,417.86x = 18,515.70 × 7,449.42
4. Step 4: Simplify right side
   13,417.86x = 137,931,225.89
5. Step 5: Solve for x
   x = 137,931,225.89/13,417.86
6. Step 6: Final answer
   x = 10,279.67