Finding the Fourth Proportional to 1,506.05, 2,258.55 and 715.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,506.05 : 2,258.55 = 715.31 : x
2. Step 2: Convert to fraction form
   1,506.05/2,258.55 = 715.31/x
3. Step 3: Cross multiply
   1,506.05x = 2,258.55 × 715.31
4. Step 4: Simplify right side
   1,506.05x = 1,615,566.36
5. Step 5: Solve for x
   x = 1,615,566.36/1,506.05
6. Step 6: Final answer
   x = 1,072.72