Finding the Fourth Proportional to 9,126.60, 12,591.61 and 7,445.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,126.60 : 12,591.61 = 7,445.10 : x
2. Step 2: Convert to fraction form
   9,126.60/12,591.61 = 7,445.10/x
3. Step 3: Cross multiply
   9,126.60x = 12,591.61 × 7,445.10
4. Step 4: Simplify right side
   9,126.60x = 93,745,795.61
5. Step 5: Solve for x
   x = 93,745,795.61/9,126.60
6. Step 6: Final answer
   x = 10,271.71