Finding the Fourth Proportional to 2,518.85, 3,476.05 and 1,399.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518.85 : 3,476.05 = 1,399.86 : x
2. Step 2: Convert to fraction form
   2,518.85/3,476.05 = 1,399.86/x
3. Step 3: Cross multiply
   2,518.85x = 3,476.05 × 1,399.86
4. Step 4: Simplify right side
   2,518.85x = 4,865,979.85
5. Step 5: Solve for x
   x = 4,865,979.85/2,518.85
6. Step 6: Final answer
   x = 1,931.82