Finding the Fourth Proportional to 1,680.83, 2,319.57 and 934.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680.83 : 2,319.57 = 934.82 : x
2. Step 2: Convert to fraction form
   1,680.83/2,319.57 = 934.82/x
3. Step 3: Cross multiply
   1,680.83x = 2,319.57 × 934.82
4. Step 4: Simplify right side
   1,680.83x = 2,168,377.53
5. Step 5: Solve for x
   x = 2,168,377.53/1,680.83
6. Step 6: Final answer
   x = 1,290.06