Finding the Fourth Proportional to 2,162.33, 2,983.90 and 1,278.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.33 : 2,983.90 = 1,278.22 : x
2. Step 2: Convert to fraction form
   2,162.33/2,983.90 = 1,278.22/x
3. Step 3: Cross multiply
   2,162.33x = 2,983.90 × 1,278.22
4. Step 4: Simplify right side
   2,162.33x = 3,814,066.81
5. Step 5: Solve for x
   x = 3,814,066.81/2,162.33
6. Step 6: Final answer
   x = 1,763.87