Finding the Fourth Proportional to 10,213.69, 15,321.48 and 3,974.17

Step by Step Solution

1. Step 1: Write the proportion equation
   10,213.69 : 15,321.48 = 3,974.17 : x
2. Step 2: Convert to fraction form
   10,213.69/15,321.48 = 3,974.17/x
3. Step 3: Cross multiply
   10,213.69x = 15,321.48 × 3,974.17
4. Step 4: Simplify right side
   10,213.69x = 60,890,166.17
5. Step 5: Solve for x
   x = 60,890,166.17/10,213.69
6. Step 6: Final answer
   x = 5,961.62