Finding the Fourth Proportional to 9,020.64, 12,444.12 and 5,661.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,020.64 : 12,444.12 = 5,661.78 : x
2. Step 2: Convert to fraction form
   9,020.64/12,444.12 = 5,661.78/x
3. Step 3: Cross multiply
   9,020.64x = 12,444.12 × 5,661.78
4. Step 4: Simplify right side
   9,020.64x = 70,455,869.73
5. Step 5: Solve for x
   x = 70,455,869.73/9,020.64
6. Step 6: Final answer
   x = 7,810.52