Finding the Third Proportional to 20,380.50 and 42,971.63

Step by Step Solution

1. Step 1: Write the proportion equation
   20,380.50 : 42,971.63 = 42,971.63 : x
2. Step 2: Convert to fraction form
   20,380.50/42,971.63 = 42,971.63/x
3. Step 3: Cross multiply
   20,380.50x = 42,971.63 × 42,971.63
4. Step 4: Simplify right side
   20,380.50x = 1,846,560,555.14
5. Step 5: Solve for x
   x = 1,846,560,555.14/20,380.50
6. Step 6: Final answer
   x = 90,604.28