Finding the Fourth Proportional to 10,613.52, 15,918.21 and 10,086.68

Step by Step Solution

1. Step 1: Write the proportion equation
   10,613.52 : 15,918.21 = 10,086.68 : x
2. Step 2: Convert to fraction form
   10,613.52/15,918.21 = 10,086.68/x
3. Step 3: Cross multiply
   10,613.52x = 15,918.21 × 10,086.68
4. Step 4: Simplify right side
   10,613.52x = 160,561,810.85
5. Step 5: Solve for x
   x = 160,561,810.85/10,613.52
6. Step 6: Final answer
   x = 15,128.05