Finding the Fourth Proportional to 1,874.31, 2,810.39 and 718.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,874.31 : 2,810.39 = 718.71 : x
2. Step 2: Convert to fraction form
   1,874.31/2,810.39 = 718.71/x
3. Step 3: Cross multiply
   1,874.31x = 2,810.39 × 718.71
4. Step 4: Simplify right side
   1,874.31x = 2,019,851.80
5. Step 5: Solve for x
   x = 2,019,851.80/1,874.31
6. Step 6: Final answer
   x = 1,077.65