Finding the Fourth Proportional to 9,238.72, 12,748.80 and 5,260.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,238.72 : 12,748.80 = 5,260.48 : x
2. Step 2: Convert to fraction form
   9,238.72/12,748.80 = 5,260.48/x
3. Step 3: Cross multiply
   9,238.72x = 12,748.80 × 5,260.48
4. Step 4: Simplify right side
   9,238.72x = 67,064,807.42
5. Step 5: Solve for x
   x = 67,064,807.42/9,238.72
6. Step 6: Final answer
   x = 7,259.10