Finding the Fourth Proportional to 5,089.56, 7,638.42 and 2,752.20

Step by Step Solution

1. Step 1: Write the proportion equation
   5,089.56 : 7,638.42 = 2,752.20 : x
2. Step 2: Convert to fraction form
   5,089.56/7,638.42 = 2,752.20/x
3. Step 3: Cross multiply
   5,089.56x = 7,638.42 × 2,752.20
4. Step 4: Simplify right side
   5,089.56x = 21,022,459.52
5. Step 5: Solve for x
   x = 21,022,459.52/5,089.56
6. Step 6: Final answer
   x = 4,130.51