Finding the Third Proportional to 90,402.75 and 196,661.25

Step by Step Solution

1. Step 1: Write the proportion equation
   90,402.75 : 196,661.25 = 196,661.25 : x
2. Step 2: Convert to fraction form
   90,402.75/196,661.25 = 196,661.25/x
3. Step 3: Cross multiply
   90,402.75x = 196,661.25 × 196,661.25
4. Step 4: Simplify right side
   90,402.75x = 38,675,647,251.56
5. Step 5: Solve for x
   x = 38,675,647,251.56/90,402.75
6. Step 6: Final answer
   x = 427,814.94