Finding the Fourth Proportional to 9,126.72, 12,591.78 and 7,445.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,126.72 : 12,591.78 = 7,445.22 : x
2. Step 2: Convert to fraction form
   9,126.72/12,591.78 = 7,445.22/x
3. Step 3: Cross multiply
   9,126.72x = 12,591.78 × 7,445.22
4. Step 4: Simplify right side
   9,126.72x = 93,748,572.29
5. Step 5: Solve for x
   x = 93,748,572.29/9,126.72
6. Step 6: Final answer
   x = 10,271.88