Finding the Third Proportional to 21,372.75 and 37,878.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,372.75 : 37,878.75 = 37,878.75 : x
2. Step 2: Convert to fraction form
   21,372.75/37,878.75 = 37,878.75/x
3. Step 3: Cross multiply
   21,372.75x = 37,878.75 × 37,878.75
4. Step 4: Simplify right side
   21,372.75x = 1,434,799,701.56
5. Step 5: Solve for x
   x = 1,434,799,701.56/21,372.75
6. Step 6: Final answer
   x = 67,132.20