Finding the Fourth Proportional to 2,790.50, 4,187.37 and 1,251.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,790.50 : 4,187.37 = 1,251.50 : x
2. Step 2: Convert to fraction form
   2,790.50/4,187.37 = 1,251.50/x
3. Step 3: Cross multiply
   2,790.50x = 4,187.37 × 1,251.50
4. Step 4: Simplify right side
   2,790.50x = 5,240,493.56
5. Step 5: Solve for x
   x = 5,240,493.56/2,790.50
6. Step 6: Final answer
   x = 1,877.98