Finding the Third Proportional to 90,358.50 and 196,803

Step by Step Solution

1. Step 1: Write the proportion equation
   90,358.50 : 196,803 = 196,803 : x
2. Step 2: Convert to fraction form
   90,358.50/196,803 = 196,803/x
3. Step 3: Cross multiply
   90,358.50x = 196,803 × 196,803
4. Step 4: Simplify right side
   90,358.50x = 38,731,420,809
5. Step 5: Solve for x
   x = 38,731,420,809/90,358.50
6. Step 6: Final answer
   x = 428,641.70