Finding the Fourth Proportional to 9,031.72, 12,463.80 and 5,257.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,031.72 : 12,463.80 = 5,257.12 : x
2. Step 2: Convert to fraction form
   9,031.72/12,463.80 = 5,257.12/x
3. Step 3: Cross multiply
   9,031.72x = 12,463.80 × 5,257.12
4. Step 4: Simplify right side
   9,031.72x = 65,523,692.26
5. Step 5: Solve for x
   x = 65,523,692.26/9,031.72
6. Step 6: Final answer
   x = 7,254.84