Finding the Third Proportional to 388,272 and 609,196

Step by Step Solution

1. Step 1: Write the proportion equation
   388,272 : 609,196 = 609,196 : x
2. Step 2: Convert to fraction form
   388,272/609,196 = 609,196/x
3. Step 3: Cross multiply
   388,272x = 609,196 × 609,196
4. Step 4: Simplify right side
   388,272x = 371,119,766,416
5. Step 5: Solve for x
   x = 371,119,766,416/388,272
6. Step 6: Final answer
   x = 955,824.18