Finding the Fourth Proportional to 1,118.61, 1,687.23 and 983.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118.61 : 1,687.23 = 983.34 : x
2. Step 2: Convert to fraction form
   1,118.61/1,687.23 = 983.34/x
3. Step 3: Cross multiply
   1,118.61x = 1,687.23 × 983.34
4. Step 4: Simplify right side
   1,118.61x = 1,659,120.75
5. Step 5: Solve for x
   x = 1,659,120.75/1,118.61
6. Step 6: Final answer
   x = 1,483.20