Finding the Fourth Proportional to 5,616.82, 7,748.83 and 4,122.15

Step by Step Solution

1. Step 1: Write the proportion equation
   5,616.82 : 7,748.83 = 4,122.15 : x
2. Step 2: Convert to fraction form
   5,616.82/7,748.83 = 4,122.15/x
3. Step 3: Cross multiply
   5,616.82x = 7,748.83 × 4,122.15
4. Step 4: Simplify right side
   5,616.82x = 31,941,839.58
5. Step 5: Solve for x
   x = 31,941,839.58/5,616.82
6. Step 6: Final answer
   x = 5,686.82