Finding the Third Proportional to 42,689.50 and 68,590.38

Step by Step Solution

1. Step 1: Write the proportion equation
   42,689.50 : 68,590.38 = 68,590.38 : x
2. Step 2: Convert to fraction form
   42,689.50/68,590.38 = 68,590.38/x
3. Step 3: Cross multiply
   42,689.50x = 68,590.38 × 68,590.38
4. Step 4: Simplify right side
   42,689.50x = 4,704,639,542.64
5. Step 5: Solve for x
   x = 4,704,639,542.64/42,689.50
6. Step 6: Final answer
   x = 110,206.01