Finding the Fourth Proportional to 3,996.38, 5,518.49 and 2,506.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,996.38 : 5,518.49 = 2,506.86 : x
2. Step 2: Convert to fraction form
   3,996.38/5,518.49 = 2,506.86/x
3. Step 3: Cross multiply
   3,996.38x = 5,518.49 × 2,506.86
4. Step 4: Simplify right side
   3,996.38x = 13,834,048.61
5. Step 5: Solve for x
   x = 13,834,048.61/3,996.38
6. Step 6: Final answer
   x = 3,461.65