Finding the Fourth Proportional to 1,146.10, 1,581.37 and 673.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.10 : 1,581.37 = 673.87 : x
2. Step 2: Convert to fraction form
   1,146.10/1,581.37 = 673.87/x
3. Step 3: Cross multiply
   1,146.10x = 1,581.37 × 673.87
4. Step 4: Simplify right side
   1,146.10x = 1,065,637.80
5. Step 5: Solve for x
   x = 1,065,637.80/1,146.10
6. Step 6: Final answer
   x = 929.79