Finding the Fourth Proportional to 2,479.52, 3,421.50 and 1,431.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,479.52 : 3,421.50 = 1,431.38 : x
2. Step 2: Convert to fraction form
   2,479.52/3,421.50 = 1,431.38/x
3. Step 3: Cross multiply
   2,479.52x = 3,421.50 × 1,431.38
4. Step 4: Simplify right side
   2,479.52x = 4,897,466.67
5. Step 5: Solve for x
   x = 4,897,466.67/2,479.52
6. Step 6: Final answer
   x = 1,975.17