Finding the Fourth Proportional to 20,952.72, 28,920.89 and 12,460.82

Step by Step Solution

1. Step 1: Write the proportion equation
   20,952.72 : 28,920.89 = 12,460.82 : x
2. Step 2: Convert to fraction form
   20,952.72/28,920.89 = 12,460.82/x
3. Step 3: Cross multiply
   20,952.72x = 28,920.89 × 12,460.82
4. Step 4: Simplify right side
   20,952.72x = 360,378,004.53
5. Step 5: Solve for x
   x = 360,378,004.53/20,952.72
6. Step 6: Final answer
   x = 17,199.58