Finding the Fourth Proportional to 12,137.55, 16,747.86 and 7,663.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,137.55 : 16,747.86 = 7,663.71 : x
2. Step 2: Convert to fraction form
   12,137.55/16,747.86 = 7,663.71/x
3. Step 3: Cross multiply
   12,137.55x = 16,747.86 × 7,663.71
4. Step 4: Simplify right side
   12,137.55x = 128,350,742.16
5. Step 5: Solve for x
   x = 128,350,742.16/12,137.55
6. Step 6: Final answer
   x = 10,574.68