Finding the Third Proportional to 19,969.66 and 42,709.78

Step by Step Solution

1. Step 1: Write the proportion equation
   19,969.66 : 42,709.78 = 42,709.78 : x
2. Step 2: Convert to fraction form
   19,969.66/42,709.78 = 42,709.78/x
3. Step 3: Cross multiply
   19,969.66x = 42,709.78 × 42,709.78
4. Step 4: Simplify right side
   19,969.66x = 1,824,125,414.42
5. Step 5: Solve for x
   x = 1,824,125,414.42/19,969.66
6. Step 6: Final answer
   x = 91,344.82