Finding the Fourth Proportional to 9,105.77, 12,565.40 and 5,521.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,105.77 : 12,565.40 = 5,521.52 : x
2. Step 2: Convert to fraction form
   9,105.77/12,565.40 = 5,521.52/x
3. Step 3: Cross multiply
   9,105.77x = 12,565.40 × 5,521.52
4. Step 4: Simplify right side
   9,105.77x = 69,380,111.21
5. Step 5: Solve for x
   x = 69,380,111.21/9,105.77
6. Step 6: Final answer
   x = 7,619.35