Finding the Third Proportional to 21,525.75 and 42,079.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,525.75 : 42,079.50 = 42,079.50 : x
2. Step 2: Convert to fraction form
   21,525.75/42,079.50 = 42,079.50/x
3. Step 3: Cross multiply
   21,525.75x = 42,079.50 × 42,079.50
4. Step 4: Simplify right side
   21,525.75x = 1,770,684,320.25
5. Step 5: Solve for x
   x = 1,770,684,320.25/21,525.75
6. Step 6: Final answer
   x = 82,258.89