Finding the Fourth Proportional to 12,340.72, 18,516.48 and 7,966.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,340.72 : 18,516.48 = 7,966.72 : x
2. Step 2: Convert to fraction form
   12,340.72/18,516.48 = 7,966.72/x
3. Step 3: Cross multiply
   12,340.72x = 18,516.48 × 7,966.72
4. Step 4: Simplify right side
   12,340.72x = 147,515,611.55
5. Step 5: Solve for x
   x = 147,515,611.55/12,340.72
6. Step 6: Final answer
   x = 11,953.57