Finding the Fourth Proportional to 2,089.88, 3,134.56 and 1,212.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,089.88 : 3,134.56 = 1,212.86 : x
2. Step 2: Convert to fraction form
   2,089.88/3,134.56 = 1,212.86/x
3. Step 3: Cross multiply
   2,089.88x = 3,134.56 × 1,212.86
4. Step 4: Simplify right side
   2,089.88x = 3,801,766.63
5. Step 5: Solve for x
   x = 3,801,766.63/2,089.88
6. Step 6: Final answer
   x = 1,819.13