Finding the Fourth Proportional to 1,319.82, 1,978.29 and 833.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,319.82 : 1,978.29 = 833.10 : x
2. Step 2: Convert to fraction form
   1,319.82/1,978.29 = 833.10/x
3. Step 3: Cross multiply
   1,319.82x = 1,978.29 × 833.10
4. Step 4: Simplify right side
   1,319.82x = 1,648,113.40
5. Step 5: Solve for x
   x = 1,648,113.40/1,319.82
6. Step 6: Final answer
   x = 1,248.74