Finding the Fourth Proportional to 1,612.83, 2,418.06 and 688.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,612.83 : 2,418.06 = 688.83 : x
2. Step 2: Convert to fraction form
   1,612.83/2,418.06 = 688.83/x
3. Step 3: Cross multiply
   1,612.83x = 2,418.06 × 688.83
4. Step 4: Simplify right side
   1,612.83x = 1,665,632.27
5. Step 5: Solve for x
   x = 1,665,632.27/1,612.83
6. Step 6: Final answer
   x = 1,032.74