Finding the Fourth Proportional to 2,485.69, 3,430.25 and 1,438.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.69 : 3,430.25 = 1,438.36 : x
2. Step 2: Convert to fraction form
   2,485.69/3,430.25 = 1,438.36/x
3. Step 3: Cross multiply
   2,485.69x = 3,430.25 × 1,438.36
4. Step 4: Simplify right side
   2,485.69x = 4,933,924.02
5. Step 5: Solve for x
   x = 4,933,924.02/2,485.69
6. Step 6: Final answer
   x = 1,984.93