Finding the Fourth Proportional to 2,711.78, 4,069.51 and 1,251.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,711.78 : 4,069.51 = 1,251.05 : x
2. Step 2: Convert to fraction form
   2,711.78/4,069.51 = 1,251.05/x
3. Step 3: Cross multiply
   2,711.78x = 4,069.51 × 1,251.05
4. Step 4: Simplify right side
   2,711.78x = 5,091,137.01
5. Step 5: Solve for x
   x = 5,091,137.01/2,711.78
6. Step 6: Final answer
   x = 1,877.42