Finding the Third Proportional to 20,938.50 and 42,987.38

Step by Step Solution

1. Step 1: Write the proportion equation
   20,938.50 : 42,987.38 = 42,987.38 : x
2. Step 2: Convert to fraction form
   20,938.50/42,987.38 = 42,987.38/x
3. Step 3: Cross multiply
   20,938.50x = 42,987.38 × 42,987.38
4. Step 4: Simplify right side
   20,938.50x = 1,847,914,409.39
5. Step 5: Solve for x
   x = 1,847,914,409.39/20,938.50
6. Step 6: Final answer
   x = 88,254.38