Finding the Fourth Proportional to 9,821.46, 13,550.56 and 5,572.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,821.46 : 13,550.56 = 5,572.20 : x
2. Step 2: Convert to fraction form
   9,821.46/13,550.56 = 5,572.20/x
3. Step 3: Cross multiply
   9,821.46x = 13,550.56 × 5,572.20
4. Step 4: Simplify right side
   9,821.46x = 75,506,430.43
5. Step 5: Solve for x
   x = 75,506,430.43/9,821.46
6. Step 6: Final answer
   x = 7,687.90