Finding the Fourth Proportional to 2,620.82, 3,931.27 and 977.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.82 : 3,931.27 = 977.27 : x
2. Step 2: Convert to fraction form
   2,620.82/3,931.27 = 977.27/x
3. Step 3: Cross multiply
   2,620.82x = 3,931.27 × 977.27
4. Step 4: Simplify right side
   2,620.82x = 3,841,890.13
5. Step 5: Solve for x
   x = 3,841,890.13/2,620.82
6. Step 6: Final answer
   x = 1,465.91