Finding the Fourth Proportional to 2,876.71, 4,315.59 and 1,782.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,876.71 : 4,315.59 = 1,782.31 : x
2. Step 2: Convert to fraction form
   2,876.71/4,315.59 = 1,782.31/x
3. Step 3: Cross multiply
   2,876.71x = 4,315.59 × 1,782.31
4. Step 4: Simplify right side
   2,876.71x = 7,691,719.21
5. Step 5: Solve for x
   x = 7,691,719.21/2,876.71
6. Step 6: Final answer
   x = 2,673.79