Finding the Fourth Proportional to 2,519.94, 3,477.42 and 1,385.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,519.94 : 3,477.42 = 1,385.67 : x
2. Step 2: Convert to fraction form
   2,519.94/3,477.42 = 1,385.67/x
3. Step 3: Cross multiply
   2,519.94x = 3,477.42 × 1,385.67
4. Step 4: Simplify right side
   2,519.94x = 4,818,556.57
5. Step 5: Solve for x
   x = 4,818,556.57/2,519.94
6. Step 6: Final answer
   x = 1,912.17