Finding the Third Proportional to 14,359.50 and 20,421.50

Step by Step Solution

1. Step 1: Write the proportion equation
   14,359.50 : 20,421.50 = 20,421.50 : x
2. Step 2: Convert to fraction form
   14,359.50/20,421.50 = 20,421.50/x
3. Step 3: Cross multiply
   14,359.50x = 20,421.50 × 20,421.50
4. Step 4: Simplify right side
   14,359.50x = 417,037,662.25
5. Step 5: Solve for x
   x = 417,037,662.25/14,359.50
6. Step 6: Final answer
   x = 29,042.63