Finding the Third Proportional to 20,644.08 and 42,825.90

Step by Step Solution

1. Step 1: Write the proportion equation
   20,644.08 : 42,825.90 = 42,825.90 : x
2. Step 2: Convert to fraction form
   20,644.08/42,825.90 = 42,825.90/x
3. Step 3: Cross multiply
   20,644.08x = 42,825.90 × 42,825.90
4. Step 4: Simplify right side
   20,644.08x = 1,834,057,911.56
5. Step 5: Solve for x
   x = 1,834,057,911.56/20,644.08
6. Step 6: Final answer
   x = 88,841.82