Finding the Fourth Proportional to 2,490.79, 3,738.50 and 1,259.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,490.79 : 3,738.50 = 1,259.06 : x
2. Step 2: Convert to fraction form
   2,490.79/3,738.50 = 1,259.06/x
3. Step 3: Cross multiply
   2,490.79x = 3,738.50 × 1,259.06
4. Step 4: Simplify right side
   2,490.79x = 4,707,003.57
5. Step 5: Solve for x
   x = 4,707,003.57/2,490.79
6. Step 6: Final answer
   x = 1,889.76