Finding the Fourth Proportional to 2,587.89, 3,572.33 and 1,539.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587.89 : 3,572.33 = 1,539.75 : x
2. Step 2: Convert to fraction form
   2,587.89/3,572.33 = 1,539.75/x
3. Step 3: Cross multiply
   2,587.89x = 3,572.33 × 1,539.75
4. Step 4: Simplify right side
   2,587.89x = 5,500,487.42
5. Step 5: Solve for x
   x = 5,500,487.42/2,587.89
6. Step 6: Final answer
   x = 2,125.47