Finding the Fourth Proportional to 9,248.72, 12,765.60 and 5,709.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,248.72 : 12,765.60 = 5,709.89 : x
2. Step 2: Convert to fraction form
   9,248.72/12,765.60 = 5,709.89/x
3. Step 3: Cross multiply
   9,248.72x = 12,765.60 × 5,709.89
4. Step 4: Simplify right side
   9,248.72x = 72,890,203.70
5. Step 5: Solve for x
   x = 72,890,203.70/9,248.72
6. Step 6: Final answer
   x = 7,881.12