Finding the Fourth Proportional to 1,279.83, 1,766.30 and 837.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.83 : 1,766.30 = 837.98 : x
2. Step 2: Convert to fraction form
   1,279.83/1,766.30 = 837.98/x
3. Step 3: Cross multiply
   1,279.83x = 1,766.30 × 837.98
4. Step 4: Simplify right side
   1,279.83x = 1,480,111.05
5. Step 5: Solve for x
   x = 1,480,111.05/1,279.83
6. Step 6: Final answer
   x = 1,156.49