Finding the Fourth Proportional to 1,605.59, 2,406.41 and 912.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,605.59 : 2,406.41 = 912.83 : x
2. Step 2: Convert to fraction form
   1,605.59/2,406.41 = 912.83/x
3. Step 3: Cross multiply
   1,605.59x = 2,406.41 × 912.83
4. Step 4: Simplify right side
   1,605.59x = 2,196,644.69
5. Step 5: Solve for x
   x = 2,196,644.69/1,605.59
6. Step 6: Final answer
   x = 1,368.13