Finding the Fourth Proportional to 2,291.72, 3,437.72 and 648.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291.72 : 3,437.72 = 648.41 : x
2. Step 2: Convert to fraction form
   2,291.72/3,437.72 = 648.41/x
3. Step 3: Cross multiply
   2,291.72x = 3,437.72 × 648.41
4. Step 4: Simplify right side
   2,291.72x = 2,229,052.03
5. Step 5: Solve for x
   x = 2,229,052.03/2,291.72
6. Step 6: Final answer
   x = 972.65