Finding the Third Proportional to 20,756.25 and 42,989.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,756.25 : 42,989.50 = 42,989.50 : x
2. Step 2: Convert to fraction form
   20,756.25/42,989.50 = 42,989.50/x
3. Step 3: Cross multiply
   20,756.25x = 42,989.50 × 42,989.50
4. Step 4: Simplify right side
   20,756.25x = 1,848,097,110.25
5. Step 5: Solve for x
   x = 1,848,097,110.25/20,756.25
6. Step 6: Final answer
   x = 89,038.10