Finding the Fourth Proportional to 5,616.98, 7,750.91 and 5,428.25

Step by Step Solution

1. Step 1: Write the proportion equation
   5,616.98 : 7,750.91 = 5,428.25 : x
2. Step 2: Convert to fraction form
   5,616.98/7,750.91 = 5,428.25/x
3. Step 3: Cross multiply
   5,616.98x = 7,750.91 × 5,428.25
4. Step 4: Simplify right side
   5,616.98x = 42,073,877.21
5. Step 5: Solve for x
   x = 42,073,877.21/5,616.98
6. Step 6: Final answer
   x = 7,490.48