Finding the Third Proportional to 90,149.20 and 192,805.31

Step by Step Solution

1. Step 1: Write the proportion equation
   90,149.20 : 192,805.31 = 192,805.31 : x
2. Step 2: Convert to fraction form
   90,149.20/192,805.31 = 192,805.31/x
3. Step 3: Cross multiply
   90,149.20x = 192,805.31 × 192,805.31
4. Step 4: Simplify right side
   90,149.20x = 37,173,888,528.22
5. Step 5: Solve for x
   x = 37,173,888,528.22/90,149.20
6. Step 6: Final answer
   x = 412,359.59