Finding the Third Proportional to 20,742.75 and 31,579.88

Step by Step Solution

1. Step 1: Write the proportion equation
   20,742.75 : 31,579.88 = 31,579.88 : x
2. Step 2: Convert to fraction form
   20,742.75/31,579.88 = 31,579.88/x
3. Step 3: Cross multiply
   20,742.75x = 31,579.88 × 31,579.88
4. Step 4: Simplify right side
   20,742.75x = 997,288,505.02
5. Step 5: Solve for x
   x = 997,288,505.02/20,742.75
6. Step 6: Final answer
   x = 48,078.90