Finding the Fourth Proportional to 2,013, 2,779.20 and 1,384.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013 : 2,779.20 = 1,384.56 : x
2. Step 2: Convert to fraction form
   2,013/2,779.20 = 1,384.56/x
3. Step 3: Cross multiply
   2,013x = 2,779.20 × 1,384.56
4. Step 4: Simplify right side
   2,013x = 3,847,969.15
5. Step 5: Solve for x
   x = 3,847,969.15/2,013
6. Step 6: Final answer
   x = 1,911.56