Finding the Fourth Proportional to 1,139.46, 1,700.96 and 974.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.46 : 1,700.96 = 974.22 : x
2. Step 2: Convert to fraction form
   1,139.46/1,700.96 = 974.22/x
3. Step 3: Cross multiply
   1,139.46x = 1,700.96 × 974.22
4. Step 4: Simplify right side
   1,139.46x = 1,657,104.38
5. Step 5: Solve for x
   x = 1,657,104.38/1,139.46
6. Step 6: Final answer
   x = 1,454.29