Finding the Fourth Proportional to 10,215.24, 15,315.66 and 3,970.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,215.24 : 15,315.66 = 3,970.05 : x
2. Step 2: Convert to fraction form
   10,215.24/15,315.66 = 3,970.05/x
3. Step 3: Cross multiply
   10,215.24x = 15,315.66 × 3,970.05
4. Step 4: Simplify right side
   10,215.24x = 60,803,935.98
5. Step 5: Solve for x
   x = 60,803,935.98/10,215.24
6. Step 6: Final answer
   x = 5,952.28