Finding the Fourth Proportional to 2,485.58, 3,430.73 and 1,423.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.58 : 3,430.73 = 1,423.69 : x
2. Step 2: Convert to fraction form
   2,485.58/3,430.73 = 1,423.69/x
3. Step 3: Cross multiply
   2,485.58x = 3,430.73 × 1,423.69
4. Step 4: Simplify right side
   2,485.58x = 4,884,278.69
5. Step 5: Solve for x
   x = 4,884,278.69/2,485.58
6. Step 6: Final answer
   x = 1,965.05