Finding the Third Proportional to 19,961 and 42,356.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,961 : 42,356.50 = 42,356.50 : x
2. Step 2: Convert to fraction form
   19,961/42,356.50 = 42,356.50/x
3. Step 3: Cross multiply
   19,961x = 42,356.50 × 42,356.50
4. Step 4: Simplify right side
   19,961x = 1,794,073,092.25
5. Step 5: Solve for x
   x = 1,794,073,092.25/19,961
6. Step 6: Final answer
   x = 89,878.92