Finding the Fourth Proportional to 9,123.92, 12,586.56 and 5,765.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.92 : 12,586.56 = 5,765.12 : x
2. Step 2: Convert to fraction form
   9,123.92/12,586.56 = 5,765.12/x
3. Step 3: Cross multiply
   9,123.92x = 12,586.56 × 5,765.12
4. Step 4: Simplify right side
   9,123.92x = 72,563,028.79
5. Step 5: Solve for x
   x = 72,563,028.79/9,123.92
6. Step 6: Final answer
   x = 7,953.05