Finding the Fourth Proportional to 2,509.10, 3,462.50 and 1,390.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,509.10 : 3,462.50 = 1,390.03 : x
2. Step 2: Convert to fraction form
   2,509.10/3,462.50 = 1,390.03/x
3. Step 3: Cross multiply
   2,509.10x = 3,462.50 × 1,390.03
4. Step 4: Simplify right side
   2,509.10x = 4,812,978.88
5. Step 5: Solve for x
   x = 4,812,978.88/2,509.10
6. Step 6: Final answer
   x = 1,918.21