Finding the Fourth Proportional to 1,530.90, 2,295.31 and 708.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.90 : 2,295.31 = 708.72 : x
2. Step 2: Convert to fraction form
   1,530.90/2,295.31 = 708.72/x
3. Step 3: Cross multiply
   1,530.90x = 2,295.31 × 708.72
4. Step 4: Simplify right side
   1,530.90x = 1,626,732.10
5. Step 5: Solve for x
   x = 1,626,732.10/1,530.90
6. Step 6: Final answer
   x = 1,062.60