Finding the Third Proportional to 90,401.70 and 196,875.56

Step by Step Solution

1. Step 1: Write the proportion equation
   90,401.70 : 196,875.56 = 196,875.56 : x
2. Step 2: Convert to fraction form
   90,401.70/196,875.56 = 196,875.56/x
3. Step 3: Cross multiply
   90,401.70x = 196,875.56 × 196,875.56
4. Step 4: Simplify right side
   90,401.70x = 38,759,987,109.69
5. Step 5: Solve for x
   x = 38,759,987,109.69/90,401.70
6. Step 6: Final answer
   x = 428,752.88