Finding the Fourth Proportional to 2,079.60, 2,870.19 and 1,581.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.60 : 2,870.19 = 1,581.45 : x
2. Step 2: Convert to fraction form
   2,079.60/2,870.19 = 1,581.45/x
3. Step 3: Cross multiply
   2,079.60x = 2,870.19 × 1,581.45
4. Step 4: Simplify right side
   2,079.60x = 4,539,061.98
5. Step 5: Solve for x
   x = 4,539,061.98/2,079.60
6. Step 6: Final answer
   x = 2,182.66