Finding the Third Proportional to 42,638.06 and 66,205.27

Step by Step Solution

1. Step 1: Write the proportion equation
   42,638.06 : 66,205.27 = 66,205.27 : x
2. Step 2: Convert to fraction form
   42,638.06/66,205.27 = 66,205.27/x
3. Step 3: Cross multiply
   42,638.06x = 66,205.27 × 66,205.27
4. Step 4: Simplify right side
   42,638.06x = 4,383,137,196.48
5. Step 5: Solve for x
   x = 4,383,137,196.48/42,638.06
6. Step 6: Final answer
   x = 102,798.70