Finding the Fourth Proportional to 1,605.81, 2,216.52 and 933.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,605.81 : 2,216.52 = 933.82 : x
2. Step 2: Convert to fraction form
   1,605.81/2,216.52 = 933.82/x
3. Step 3: Cross multiply
   1,605.81x = 2,216.52 × 933.82
4. Step 4: Simplify right side
   1,605.81x = 2,069,829.67
5. Step 5: Solve for x
   x = 2,069,829.67/1,605.81
6. Step 6: Final answer
   x = 1,288.96