Finding the Third Proportional to 67,320 and 145,783

Step by Step Solution

1. Step 1: Write the proportion equation
   67,320 : 145,783 = 145,783 : x
2. Step 2: Convert to fraction form
   67,320/145,783 = 145,783/x
3. Step 3: Cross multiply
   67,320x = 145,783 × 145,783
4. Step 4: Simplify right side
   67,320x = 21,252,683,089
5. Step 5: Solve for x
   x = 21,252,683,089/67,320
6. Step 6: Final answer
   x = 315,696.42