Finding the Fourth Proportional to 2,810.59, 4,215.98 and 1,055.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,810.59 : 4,215.98 = 1,055.43 : x
2. Step 2: Convert to fraction form
   2,810.59/4,215.98 = 1,055.43/x
3. Step 3: Cross multiply
   2,810.59x = 4,215.98 × 1,055.43
4. Step 4: Simplify right side
   2,810.59x = 4,449,674.41
5. Step 5: Solve for x
   x = 4,449,674.41/2,810.59
6. Step 6: Final answer
   x = 1,583.18