Finding the Fourth Proportional to 2,620.67, 3,931.67 and 977.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.67 : 3,931.67 = 977.27 : x
2. Step 2: Convert to fraction form
   2,620.67/3,931.67 = 977.27/x
3. Step 3: Cross multiply
   2,620.67x = 3,931.67 × 977.27
4. Step 4: Simplify right side
   2,620.67x = 3,842,298.25
5. Step 5: Solve for x
   x = 3,842,298.25/2,620.67
6. Step 6: Final answer
   x = 1,466.15