Finding the Fourth Proportional to 2,073.78, 3,109.12 and 1,251.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.78 : 3,109.12 = 1,251.86 : x
2. Step 2: Convert to fraction form
   2,073.78/3,109.12 = 1,251.86/x
3. Step 3: Cross multiply
   2,073.78x = 3,109.12 × 1,251.86
4. Step 4: Simplify right side
   2,073.78x = 3,892,182.96
5. Step 5: Solve for x
   x = 3,892,182.96/2,073.78
6. Step 6: Final answer
   x = 1,876.85