Finding the Third Proportional to 388,820 and 609,150

Step by Step Solution

1. Step 1: Write the proportion equation
   388,820 : 609,150 = 609,150 : x
2. Step 2: Convert to fraction form
   388,820/609,150 = 609,150/x
3. Step 3: Cross multiply
   388,820x = 609,150 × 609,150
4. Step 4: Simplify right side
   388,820x = 371,063,722,500
5. Step 5: Solve for x
   x = 371,063,722,500/388,820
6. Step 6: Final answer
   x = 954,332.91