Finding the Fourth Proportional to 15,867.69, 21,907.37 and 10,212.27

Step by Step Solution

1. Step 1: Write the proportion equation
   15,867.69 : 21,907.37 = 10,212.27 : x
2. Step 2: Convert to fraction form
   15,867.69/21,907.37 = 10,212.27/x
3. Step 3: Cross multiply
   15,867.69x = 21,907.37 × 10,212.27
4. Step 4: Simplify right side
   15,867.69x = 223,723,867.89
5. Step 5: Solve for x
   x = 223,723,867.89/15,867.69
6. Step 6: Final answer
   x = 14,099.33