Finding the Fourth Proportional to 2,644.22, 3,963.15 and 977.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,644.22 : 3,963.15 = 977.02 : x
2. Step 2: Convert to fraction form
   2,644.22/3,963.15 = 977.02/x
3. Step 3: Cross multiply
   2,644.22x = 3,963.15 × 977.02
4. Step 4: Simplify right side
   2,644.22x = 3,872,066.91
5. Step 5: Solve for x
   x = 3,872,066.91/2,644.22
6. Step 6: Final answer
   x = 1,464.35