Finding the Fourth Proportional to 21,964.16, 30,315.12 and 20,192.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,964.16 : 30,315.12 = 20,192.96 : x
2. Step 2: Convert to fraction form
   21,964.16/30,315.12 = 20,192.96/x
3. Step 3: Cross multiply
   21,964.16x = 30,315.12 × 20,192.96
4. Step 4: Simplify right side
   21,964.16x = 612,152,005.56
5. Step 5: Solve for x
   x = 612,152,005.56/21,964.16
6. Step 6: Final answer
   x = 27,870.49