Finding the Third Proportional to 20,359.50 and 42,906

Step by Step Solution

1. Step 1: Write the proportion equation
   20,359.50 : 42,906 = 42,906 : x
2. Step 2: Convert to fraction form
   20,359.50/42,906 = 42,906/x
3. Step 3: Cross multiply
   20,359.50x = 42,906 × 42,906
4. Step 4: Simplify right side
   20,359.50x = 1,840,924,836
5. Step 5: Solve for x
   x = 1,840,924,836/20,359.50
6. Step 6: Final answer
   x = 90,420.93