Finding the Fourth Proportional to 9,220.53, 12,720.71 and 5,677.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,220.53 : 12,720.71 = 5,677.59 : x
2. Step 2: Convert to fraction form
   9,220.53/12,720.71 = 5,677.59/x
3. Step 3: Cross multiply
   9,220.53x = 12,720.71 × 5,677.59
4. Step 4: Simplify right side
   9,220.53x = 72,222,947.50
5. Step 5: Solve for x
   x = 72,222,947.50/9,220.53
6. Step 6: Final answer
   x = 7,832.84