Finding the Fourth Proportional to 2,552.50, 3,826.72 and 1,320.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,552.50 : 3,826.72 = 1,320.09 : x
2. Step 2: Convert to fraction form
   2,552.50/3,826.72 = 1,320.09/x
3. Step 3: Cross multiply
   2,552.50x = 3,826.72 × 1,320.09
4. Step 4: Simplify right side
   2,552.50x = 5,051,614.80
5. Step 5: Solve for x
   x = 5,051,614.80/2,552.50
6. Step 6: Final answer
   x = 1,979.09