Finding the Fourth Proportional to 1,870.56, 2,581.20 and 1,171.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.56 : 2,581.20 = 1,171.80 : x
2. Step 2: Convert to fraction form
   1,870.56/2,581.20 = 1,171.80/x
3. Step 3: Cross multiply
   1,870.56x = 2,581.20 × 1,171.80
4. Step 4: Simplify right side
   1,870.56x = 3,024,650.16
5. Step 5: Solve for x
   x = 3,024,650.16/1,870.56
6. Step 6: Final answer
   x = 1,616.98