Finding the Fourth Proportional to 10,212.39, 15,310.17 and 3,969.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,212.39 : 15,310.17 = 3,969.18 : x
2. Step 2: Convert to fraction form
   10,212.39/15,310.17 = 3,969.18/x
3. Step 3: Cross multiply
   10,212.39x = 15,310.17 × 3,969.18
4. Step 4: Simplify right side
   10,212.39x = 60,768,820.56
5. Step 5: Solve for x
   x = 60,768,820.56/10,212.39
6. Step 6: Final answer
   x = 5,950.50