Finding the Fourth Proportional to 6,974.38, 9,624.47 and 3,990.02

Step by Step Solution

1. Step 1: Write the proportion equation
   6,974.38 : 9,624.47 = 3,990.02 : x
2. Step 2: Convert to fraction form
   6,974.38/9,624.47 = 3,990.02/x
3. Step 3: Cross multiply
   6,974.38x = 9,624.47 × 3,990.02
4. Step 4: Simplify right side
   6,974.38x = 38,401,759.72
5. Step 5: Solve for x
   x = 38,401,759.72/6,974.38
6. Step 6: Final answer
   x = 5,506.12