Finding the Fourth Proportional to 13,613.04, 18,785.52 and 8,316.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,613.04 : 18,785.52 = 8,316.72 : x
2. Step 2: Convert to fraction form
   13,613.04/18,785.52 = 8,316.72/x
3. Step 3: Cross multiply
   13,613.04x = 18,785.52 × 8,316.72
4. Step 4: Simplify right side
   13,613.04x = 156,233,909.89
5. Step 5: Solve for x
   x = 156,233,909.89/13,613.04
6. Step 6: Final answer
   x = 11,476.78