Finding the Fourth Proportional to 20,448.02, 28,145.15 and 14,469.31

Step by Step Solution

1. Step 1: Write the proportion equation
   20,448.02 : 28,145.15 = 14,469.31 : x
2. Step 2: Convert to fraction form
   20,448.02/28,145.15 = 14,469.31/x
3. Step 3: Cross multiply
   20,448.02x = 28,145.15 × 14,469.31
4. Step 4: Simplify right side
   20,448.02x = 407,240,978.20
5. Step 5: Solve for x
   x = 407,240,978.20/20,448.02
6. Step 6: Final answer
   x = 19,915.91