Finding the Fourth Proportional to 2,164.59, 2,987.28 and 1,870.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,164.59 : 2,987.28 = 1,870.56 : x
2. Step 2: Convert to fraction form
   2,164.59/2,987.28 = 1,870.56/x
3. Step 3: Cross multiply
   2,164.59x = 2,987.28 × 1,870.56
4. Step 4: Simplify right side
   2,164.59x = 5,587,886.48
5. Step 5: Solve for x
   x = 5,587,886.48/2,164.59
6. Step 6: Final answer
   x = 2,581.50