Finding the Fourth Proportional to 1,612.31, 2,225.34 and 983.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,612.31 : 2,225.34 = 983.05 : x
2. Step 2: Convert to fraction form
   1,612.31/2,225.34 = 983.05/x
3. Step 3: Cross multiply
   1,612.31x = 2,225.34 × 983.05
4. Step 4: Simplify right side
   1,612.31x = 2,187,620.49
5. Step 5: Solve for x
   x = 2,187,620.49/1,612.31
6. Step 6: Final answer
   x = 1,356.82