Finding the Fourth Proportional to 15,795.16, 21,797.46 and 8,722.12

Step by Step Solution

1. Step 1: Write the proportion equation
   15,795.16 : 21,797.46 = 8,722.12 : x
2. Step 2: Convert to fraction form
   15,795.16/21,797.46 = 8,722.12/x
3. Step 3: Cross multiply
   15,795.16x = 21,797.46 × 8,722.12
4. Step 4: Simplify right side
   15,795.16x = 190,120,061.82
5. Step 5: Solve for x
   x = 190,120,061.82/15,795.16
6. Step 6: Final answer
   x = 12,036.60