Finding the Fourth Proportional to 9,257.47, 12,781.20 and 5,722.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,257.47 : 12,781.20 = 5,722.72 : x
2. Step 2: Convert to fraction form
   9,257.47/12,781.20 = 5,722.72/x
3. Step 3: Cross multiply
   9,257.47x = 12,781.20 × 5,722.72
4. Step 4: Simplify right side
   9,257.47x = 73,143,228.86
5. Step 5: Solve for x
   x = 73,143,228.86/9,257.47
6. Step 6: Final answer
   x = 7,901.00