Finding the Fourth Proportional to 2,025.62, 2,777.12 and 1,988.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,025.62 : 2,777.12 = 1,988.72 : x
2. Step 2: Convert to fraction form
   2,025.62/2,777.12 = 1,988.72/x
3. Step 3: Cross multiply
   2,025.62x = 2,777.12 × 1,988.72
4. Step 4: Simplify right side
   2,025.62x = 5,522,890.26
5. Step 5: Solve for x
   x = 5,522,890.26/2,025.62
6. Step 6: Final answer
   x = 2,726.53