Finding the Fourth Proportional to 1,959.83, 2,937.42 and 861.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,959.83 : 2,937.42 = 861.89 : x
2. Step 2: Convert to fraction form
   1,959.83/2,937.42 = 861.89/x
3. Step 3: Cross multiply
   1,959.83x = 2,937.42 × 861.89
4. Step 4: Simplify right side
   1,959.83x = 2,531,728.61
5. Step 5: Solve for x
   x = 2,531,728.61/1,959.83
6. Step 6: Final answer
   x = 1,291.81