Finding the Fourth Proportional to 2,518.73, 3,475.68 and 1,399.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518.73 : 3,475.68 = 1,399.67 : x
2. Step 2: Convert to fraction form
   2,518.73/3,475.68 = 1,399.67/x
3. Step 3: Cross multiply
   2,518.73x = 3,475.68 × 1,399.67
4. Step 4: Simplify right side
   2,518.73x = 4,864,805.03
5. Step 5: Solve for x
   x = 4,864,805.03/2,518.73
6. Step 6: Final answer
   x = 1,931.45