Finding the Fourth Proportional to 1,744.56, 2,616.90 and 648.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,744.56 : 2,616.90 = 648.72 : x
2. Step 2: Convert to fraction form
   1,744.56/2,616.90 = 648.72/x
3. Step 3: Cross multiply
   1,744.56x = 2,616.90 × 648.72
4. Step 4: Simplify right side
   1,744.56x = 1,697,635.37
5. Step 5: Solve for x
   x = 1,697,635.37/1,744.56
6. Step 6: Final answer
   x = 973.10