Finding the Fourth Proportional to 1,813.31, 2,502.37 and 985.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,813.31 : 2,502.37 = 985.31 : x
2. Step 2: Convert to fraction form
   1,813.31/2,502.37 = 985.31/x
3. Step 3: Cross multiply
   1,813.31x = 2,502.37 × 985.31
4. Step 4: Simplify right side
   1,813.31x = 2,465,610.18
5. Step 5: Solve for x
   x = 2,465,610.18/1,813.31
6. Step 6: Final answer
   x = 1,359.73