Finding the Fourth Proportional to 1,605.12, 2,215.33 and 932.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,605.12 : 2,215.33 = 932.82 : x
2. Step 2: Convert to fraction form
   1,605.12/2,215.33 = 932.82/x
3. Step 3: Cross multiply
   1,605.12x = 2,215.33 × 932.82
4. Step 4: Simplify right side
   1,605.12x = 2,066,504.13
5. Step 5: Solve for x
   x = 2,066,504.13/1,605.12
6. Step 6: Final answer
   x = 1,287.45