Finding the Fourth Proportional to 12,582.56, 17,347.92 and 7,865.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,582.56 : 17,347.92 = 7,865.12 : x
2. Step 2: Convert to fraction form
   12,582.56/17,347.92 = 7,865.12/x
3. Step 3: Cross multiply
   12,582.56x = 17,347.92 × 7,865.12
4. Step 4: Simplify right side
   12,582.56x = 136,443,472.55
5. Step 5: Solve for x
   x = 136,443,472.55/12,582.56
6. Step 6: Final answer
   x = 10,843.86