Finding the Fourth Proportional to 13,017.42, 17,966.34 and 7,715.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,017.42 : 17,966.34 = 7,715.16 : x
2. Step 2: Convert to fraction form
   13,017.42/17,966.34 = 7,715.16/x
3. Step 3: Cross multiply
   13,017.42x = 17,966.34 × 7,715.16
4. Step 4: Simplify right side
   13,017.42x = 138,613,187.71
5. Step 5: Solve for x
   x = 138,613,187.71/13,017.42
6. Step 6: Final answer
   x = 10,648.28