Finding the Fourth Proportional to 9,123.47, 12,591.60 and 5,348.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.47 : 12,591.60 = 5,348.12 : x
2. Step 2: Convert to fraction form
   9,123.47/12,591.60 = 5,348.12/x
3. Step 3: Cross multiply
   9,123.47x = 12,591.60 × 5,348.12
4. Step 4: Simplify right side
   9,123.47x = 67,341,324.83
5. Step 5: Solve for x
   x = 67,341,324.83/9,123.47
6. Step 6: Final answer
   x = 7,381.11