Finding the Fourth Proportional to 7,401.71, 10,214.36 and 3,998.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,401.71 : 10,214.36 = 3,998.72 : x
2. Step 2: Convert to fraction form
   7,401.71/10,214.36 = 3,998.72/x
3. Step 3: Cross multiply
   7,401.71x = 10,214.36 × 3,998.72
4. Step 4: Simplify right side
   7,401.71x = 40,844,317.45
5. Step 5: Solve for x
   x = 40,844,317.45/7,401.71
6. Step 6: Final answer
   x = 5,518.23