Finding the Fourth Proportional to 2,626.20, 3,936.87 and 981.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,626.20 : 3,936.87 = 981.50 : x
2. Step 2: Convert to fraction form
   2,626.20/3,936.87 = 981.50/x
3. Step 3: Cross multiply
   2,626.20x = 3,936.87 × 981.50
4. Step 4: Simplify right side
   2,626.20x = 3,864,018.22
5. Step 5: Solve for x
   x = 3,864,018.22/2,626.20
6. Step 6: Final answer
   x = 1,471.33