Finding the Fourth Proportional to 2,518.88, 3,475.98 and 1,399.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518.88 : 3,475.98 = 1,399.79 : x
2. Step 2: Convert to fraction form
   2,518.88/3,475.98 = 1,399.79/x
3. Step 3: Cross multiply
   2,518.88x = 3,475.98 × 1,399.79
4. Step 4: Simplify right side
   2,518.88x = 4,865,642.04
5. Step 5: Solve for x
   x = 4,865,642.04/2,518.88
6. Step 6: Final answer
   x = 1,931.67