Finding the Fourth Proportional to 2,620.94, 3,932.24 and 977.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.94 : 3,932.24 = 977.72 : x
2. Step 2: Convert to fraction form
   2,620.94/3,932.24 = 977.72/x
3. Step 3: Cross multiply
   2,620.94x = 3,932.24 × 977.72
4. Step 4: Simplify right side
   2,620.94x = 3,844,629.69
5. Step 5: Solve for x
   x = 3,844,629.69/2,620.94
6. Step 6: Final answer
   x = 1,466.89