Finding the Fourth Proportional to 2,586.52, 3,570.42 and 1,987.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,586.52 : 3,570.42 = 1,987.84 : x
2. Step 2: Convert to fraction form
   2,586.52/3,570.42 = 1,987.84/x
3. Step 3: Cross multiply
   2,586.52x = 3,570.42 × 1,987.84
4. Step 4: Simplify right side
   2,586.52x = 7,097,423.69
5. Step 5: Solve for x
   x = 7,097,423.69/2,586.52
6. Step 6: Final answer
   x = 2,744.00