Finding the Fourth Proportional to 12,816.59, 17,686.22 and 7,151.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,816.59 : 17,686.22 = 7,151.27 : x
2. Step 2: Convert to fraction form
   12,816.59/17,686.22 = 7,151.27/x
3. Step 3: Cross multiply
   12,816.59x = 17,686.22 × 7,151.27
4. Step 4: Simplify right side
   12,816.59x = 126,478,810.31
5. Step 5: Solve for x
   x = 126,478,810.31/12,816.59
6. Step 6: Final answer
   x = 9,868.37