Finding the Fourth Proportional to 1,805.63, 2,707.31 and 708.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,805.63 : 2,707.31 = 708.72 : x
2. Step 2: Convert to fraction form
   1,805.63/2,707.31 = 708.72/x
3. Step 3: Cross multiply
   1,805.63x = 2,707.31 × 708.72
4. Step 4: Simplify right side
   1,805.63x = 1,918,726.52
5. Step 5: Solve for x
   x = 1,918,726.52/1,805.63
6. Step 6: Final answer
   x = 1,062.64