Finding the Fourth Proportional to 13,613.34, 20,427.89 and 5,715.17

Step by Step Solution

1. Step 1: Write the proportion equation
   13,613.34 : 20,427.89 = 5,715.17 : x
2. Step 2: Convert to fraction form
   13,613.34/20,427.89 = 5,715.17/x
3. Step 3: Cross multiply
   13,613.34x = 20,427.89 × 5,715.17
4. Step 4: Simplify right side
   13,613.34x = 116,748,776.24
5. Step 5: Solve for x
   x = 116,748,776.24/13,613.34
6. Step 6: Final answer
   x = 8,576.06