Finding the Fourth Proportional to 2,615.59, 3,609.43 and 1,870.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.59 : 3,609.43 = 1,870.80 : x
2. Step 2: Convert to fraction form
   2,615.59/3,609.43 = 1,870.80/x
3. Step 3: Cross multiply
   2,615.59x = 3,609.43 × 1,870.80
4. Step 4: Simplify right side
   2,615.59x = 6,752,494.24
5. Step 5: Solve for x
   x = 6,752,494.24/2,615.59
6. Step 6: Final answer
   x = 2,581.63