Finding the Fourth Proportional to 12,387.27, 17,108.64 and 8,157.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,387.27 : 17,108.64 = 8,157.25 : x
2. Step 2: Convert to fraction form
   12,387.27/17,108.64 = 8,157.25/x
3. Step 3: Cross multiply
   12,387.27x = 17,108.64 × 8,157.25
4. Step 4: Simplify right side
   12,387.27x = 139,559,475.03
5. Step 5: Solve for x
   x = 139,559,475.03/12,387.27
6. Step 6: Final answer
   x = 11,266.36