Finding the Fourth Proportional to 2,162.60, 2,983.68 and 1,278.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.60 : 2,983.68 = 1,278.56 : x
2. Step 2: Convert to fraction form
   2,162.60/2,983.68 = 1,278.56/x
3. Step 3: Cross multiply
   2,162.60x = 2,983.68 × 1,278.56
4. Step 4: Simplify right side
   2,162.60x = 3,814,813.90
5. Step 5: Solve for x
   x = 3,814,813.90/2,162.60
6. Step 6: Final answer
   x = 1,763.99