Finding the Third Proportional to 90,816 and 199,040

Step by Step Solution

1. Step 1: Write the proportion equation
   90,816 : 199,040 = 199,040 : x
2. Step 2: Convert to fraction form
   90,816/199,040 = 199,040/x
3. Step 3: Cross multiply
   90,816x = 199,040 × 199,040
4. Step 4: Simplify right side
   90,816x = 39,616,921,600
5. Step 5: Solve for x
   x = 39,616,921,600/90,816
6. Step 6: Final answer
   x = 436,232.84