Finding the Fourth Proportional to 1,446.42, 2,166.98 and 1,290.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,446.42 : 2,166.98 = 1,290.77 : x
2. Step 2: Convert to fraction form
   1,446.42/2,166.98 = 1,290.77/x
3. Step 3: Cross multiply
   1,446.42x = 2,166.98 × 1,290.77
4. Step 4: Simplify right side
   1,446.42x = 2,797,055.49
5. Step 5: Solve for x
   x = 2,797,055.49/1,446.42
6. Step 6: Final answer
   x = 1,933.78