Finding the Fourth Proportional to 9,239.27, 12,748.31 and 5,259.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,239.27 : 12,748.31 = 5,259.34 : x
2. Step 2: Convert to fraction form
   9,239.27/12,748.31 = 5,259.34/x
3. Step 3: Cross multiply
   9,239.27x = 12,748.31 × 5,259.34
4. Step 4: Simplify right side
   9,239.27x = 67,047,638.55
5. Step 5: Solve for x
   x = 67,047,638.55/9,239.27
6. Step 6: Final answer
   x = 7,256.81