Finding the Third Proportional to 90,859.50 and 199,620

Step by Step Solution

1. Step 1: Write the proportion equation
   90,859.50 : 199,620 = 199,620 : x
2. Step 2: Convert to fraction form
   90,859.50/199,620 = 199,620/x
3. Step 3: Cross multiply
   90,859.50x = 199,620 × 199,620
4. Step 4: Simplify right side
   90,859.50x = 39,848,144,400
5. Step 5: Solve for x
   x = 39,848,144,400/90,859.50
6. Step 6: Final answer
   x = 438,568.83