Finding the Fourth Proportional to 1,878.56, 2,816.16 and 724.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,878.56 : 2,816.16 = 724.04 : x
2. Step 2: Convert to fraction form
   1,878.56/2,816.16 = 724.04/x
3. Step 3: Cross multiply
   1,878.56x = 2,816.16 × 724.04
4. Step 4: Simplify right side
   1,878.56x = 2,039,012.49
5. Step 5: Solve for x
   x = 2,039,012.49/1,878.56
6. Step 6: Final answer
   x = 1,085.41