Finding the Third Proportional to 19,690.50 and 42,661.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,690.50 : 42,661.50 = 42,661.50 : x
2. Step 2: Convert to fraction form
   19,690.50/42,661.50 = 42,661.50/x
3. Step 3: Cross multiply
   19,690.50x = 42,661.50 × 42,661.50
4. Step 4: Simplify right side
   19,690.50x = 1,820,003,582.25
5. Step 5: Solve for x
   x = 1,820,003,582.25/19,690.50
6. Step 6: Final answer
   x = 92,430.54