Finding the Fourth Proportional to 9,243.72, 12,758.28 and 5,417.85

Step by Step Solution

1. Step 1: Write the proportion equation
   9,243.72 : 12,758.28 = 5,417.85 : x
2. Step 2: Convert to fraction form
   9,243.72/12,758.28 = 5,417.85/x
3. Step 3: Cross multiply
   9,243.72x = 12,758.28 × 5,417.85
4. Step 4: Simplify right side
   9,243.72x = 69,122,474.82
5. Step 5: Solve for x
   x = 69,122,474.82/9,243.72
6. Step 6: Final answer
   x = 7,477.78