Finding the Fourth Proportional to 1,150.05, 1,724.40 and 456.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.05 : 1,724.40 = 456.15 : x
2. Step 2: Convert to fraction form
   1,150.05/1,724.40 = 456.15/x
3. Step 3: Cross multiply
   1,150.05x = 1,724.40 × 456.15
4. Step 4: Simplify right side
   1,150.05x = 786,585.06
5. Step 5: Solve for x
   x = 786,585.06/1,150.05
6. Step 6: Final answer
   x = 683.96