Finding the Fourth Proportional to 1,640.67, 2,264.39 and 932.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,640.67 : 2,264.39 = 932.83 : x
2. Step 2: Convert to fraction form
   1,640.67/2,264.39 = 932.83/x
3. Step 3: Cross multiply
   1,640.67x = 2,264.39 × 932.83
4. Step 4: Simplify right side
   1,640.67x = 2,112,284.10
5. Step 5: Solve for x
   x = 2,112,284.10/1,640.67
6. Step 6: Final answer
   x = 1,287.46