Finding the Fourth Proportional to 1,106.72, 1,655.52 and 983.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,106.72 : 1,655.52 = 983.40 : x
2. Step 2: Convert to fraction form
   1,106.72/1,655.52 = 983.40/x
3. Step 3: Cross multiply
   1,106.72x = 1,655.52 × 983.40
4. Step 4: Simplify right side
   1,106.72x = 1,628,038.37
5. Step 5: Solve for x
   x = 1,628,038.37/1,106.72
6. Step 6: Final answer
   x = 1,471.05