Finding the Third Proportional to 19,661.25 and 42,436.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,661.25 : 42,436.50 = 42,436.50 : x
2. Step 2: Convert to fraction form
   19,661.25/42,436.50 = 42,436.50/x
3. Step 3: Cross multiply
   19,661.25x = 42,436.50 × 42,436.50
4. Step 4: Simplify right side
   19,661.25x = 1,800,856,532.25
5. Step 5: Solve for x
   x = 1,800,856,532.25/19,661.25
6. Step 6: Final answer
   x = 91,594.20