Finding the Fourth Proportional to 9,020.13, 12,443.43 and 5,661.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,020.13 : 12,443.43 = 5,661.28 : x
2. Step 2: Convert to fraction form
   9,020.13/12,443.43 = 5,661.28/x
3. Step 3: Cross multiply
   9,020.13x = 12,443.43 × 5,661.28
4. Step 4: Simplify right side
   9,020.13x = 70,445,741.39
5. Step 5: Solve for x
   x = 70,445,741.39/9,020.13
6. Step 6: Final answer
   x = 7,809.84