Finding the Fourth Proportional to 1,605.16, 2,215.41 and 933.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,605.16 : 2,215.41 = 933.05 : x
2. Step 2: Convert to fraction form
   1,605.16/2,215.41 = 933.05/x
3. Step 3: Cross multiply
   1,605.16x = 2,215.41 × 933.05
4. Step 4: Simplify right side
   1,605.16x = 2,067,094.17
5. Step 5: Solve for x
   x = 2,067,094.17/1,605.16
6. Step 6: Final answer
   x = 1,287.78