Finding the Fourth Proportional to 9,105.68, 12,562.92 and 5,378.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,105.68 : 12,562.92 = 5,378.96 : x
2. Step 2: Convert to fraction form
   9,105.68/12,562.92 = 5,378.96/x
3. Step 3: Cross multiply
   9,105.68x = 12,562.92 × 5,378.96
4. Step 4: Simplify right side
   9,105.68x = 67,575,444.16
5. Step 5: Solve for x
   x = 67,575,444.16/9,105.68
6. Step 6: Final answer
   x = 7,421.24