Finding the Fourth Proportional to 15,920.71, 21,969.61 and 8,846.89

Step by Step Solution

1. Step 1: Write the proportion equation
   15,920.71 : 21,969.61 = 8,846.89 : x
2. Step 2: Convert to fraction form
   15,920.71/21,969.61 = 8,846.89/x
3. Step 3: Cross multiply
   15,920.71x = 21,969.61 × 8,846.89
4. Step 4: Simplify right side
   15,920.71x = 194,362,723.01
5. Step 5: Solve for x
   x = 194,362,723.01/15,920.71
6. Step 6: Final answer
   x = 12,208.17