Finding the Fourth Proportional to 2,427.98, 3,638.90 and 1,317.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,427.98 : 3,638.90 = 1,317.34 : x
2. Step 2: Convert to fraction form
   2,427.98/3,638.90 = 1,317.34/x
3. Step 3: Cross multiply
   2,427.98x = 3,638.90 × 1,317.34
4. Step 4: Simplify right side
   2,427.98x = 4,793,668.53
5. Step 5: Solve for x
   x = 4,793,668.53/2,427.98
6. Step 6: Final answer
   x = 1,974.34