Finding the Fourth Proportional to 1,359.31, 1,876.99 and 862.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.31 : 1,876.99 = 862.83 : x
2. Step 2: Convert to fraction form
   1,359.31/1,876.99 = 862.83/x
3. Step 3: Cross multiply
   1,359.31x = 1,876.99 × 862.83
4. Step 4: Simplify right side
   1,359.31x = 1,619,513.90
5. Step 5: Solve for x
   x = 1,619,513.90/1,359.31
6. Step 6: Final answer
   x = 1,191.43