Finding the Fourth Proportional to 9,103.76, 12,565.16 and 5,378.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,103.76 : 12,565.16 = 5,378.32 : x
2. Step 2: Convert to fraction form
   9,103.76/12,565.16 = 5,378.32/x
3. Step 3: Cross multiply
   9,103.76x = 12,565.16 × 5,378.32
4. Step 4: Simplify right side
   9,103.76x = 67,579,451.33
5. Step 5: Solve for x
   x = 67,579,451.33/9,103.76
6. Step 6: Final answer
   x = 7,423.25