Finding the Fourth Proportional to 2,338.77, 3,227.58 and 1,290.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,338.77 : 3,227.58 = 1,290.86 : x
2. Step 2: Convert to fraction form
   2,338.77/3,227.58 = 1,290.86/x
3. Step 3: Cross multiply
   2,338.77x = 3,227.58 × 1,290.86
4. Step 4: Simplify right side
   2,338.77x = 4,166,337.78
5. Step 5: Solve for x
   x = 4,166,337.78/2,338.77
6. Step 6: Final answer
   x = 1,781.42