Finding the Third Proportional to 42,404 and 91,790

Step by Step Solution

1. Step 1: Write the proportion equation
   42,404 : 91,790 = 91,790 : x
2. Step 2: Convert to fraction form
   42,404/91,790 = 91,790/x
3. Step 3: Cross multiply
   42,404x = 91,790 × 91,790
4. Step 4: Simplify right side
   42,404x = 8,425,404,100
5. Step 5: Solve for x
   x = 8,425,404,100/42,404
6. Step 6: Final answer
   x = 198,693.62