Finding the Fourth Proportional to 2,459.20, 3,688.72 and 997.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,459.20 : 3,688.72 = 997.96 : x
2. Step 2: Convert to fraction form
   2,459.20/3,688.72 = 997.96/x
3. Step 3: Cross multiply
   2,459.20x = 3,688.72 × 997.96
4. Step 4: Simplify right side
   2,459.20x = 3,681,195.01
5. Step 5: Solve for x
   x = 3,681,195.01/2,459.20
6. Step 6: Final answer
   x = 1,496.91