Finding the Fourth Proportional to 2,479.56, 3,720.18 and 1,555.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,479.56 : 3,720.18 = 1,555.80 : x
2. Step 2: Convert to fraction form
   2,479.56/3,720.18 = 1,555.80/x
3. Step 3: Cross multiply
   2,479.56x = 3,720.18 × 1,555.80
4. Step 4: Simplify right side
   2,479.56x = 5,787,856.04
5. Step 5: Solve for x
   x = 5,787,856.04/2,479.56
6. Step 6: Final answer
   x = 2,334.23