Finding the Fourth Proportional to 2,440.42, 3,657.89 and 977.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,440.42 : 3,657.89 = 977.87 : x
2. Step 2: Convert to fraction form
   2,440.42/3,657.89 = 977.87/x
3. Step 3: Cross multiply
   2,440.42x = 3,657.89 × 977.87
4. Step 4: Simplify right side
   2,440.42x = 3,576,952.48
5. Step 5: Solve for x
   x = 3,576,952.48/2,440.42
6. Step 6: Final answer
   x = 1,465.71