Finding the Fourth Proportional to 1,880.31, 2,819.69 and 710.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,880.31 : 2,819.69 = 710.11 : x
2. Step 2: Convert to fraction form
   1,880.31/2,819.69 = 710.11/x
3. Step 3: Cross multiply
   1,880.31x = 2,819.69 × 710.11
4. Step 4: Simplify right side
   1,880.31x = 2,002,279.47
5. Step 5: Solve for x
   x = 2,002,279.47/1,880.31
6. Step 6: Final answer
   x = 1,064.87