Finding the Fourth Proportional to 2,485.95, 3,430.71 and 1,423.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.95 : 3,430.71 = 1,423.89 : x
2. Step 2: Convert to fraction form
   2,485.95/3,430.71 = 1,423.89/x
3. Step 3: Cross multiply
   2,485.95x = 3,430.71 × 1,423.89
4. Step 4: Simplify right side
   2,485.95x = 4,884,953.66
5. Step 5: Solve for x
   x = 4,884,953.66/2,485.95
6. Step 6: Final answer
   x = 1,965.02