Finding the Fourth Proportional to 2,722.50, 4,078.32 and 1,259.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,722.50 : 4,078.32 = 1,259.64 : x
2. Step 2: Convert to fraction form
   2,722.50/4,078.32 = 1,259.64/x
3. Step 3: Cross multiply
   2,722.50x = 4,078.32 × 1,259.64
4. Step 4: Simplify right side
   2,722.50x = 5,137,215.00
5. Step 5: Solve for x
   x = 5,137,215.00/2,722.50
6. Step 6: Final answer
   x = 1,886.95