Finding the Third Proportional to 250,587 and 388,611

Step by Step Solution

1. Step 1: Write the proportion equation
   250,587 : 388,611 = 388,611 : x
2. Step 2: Convert to fraction form
   250,587/388,611 = 388,611/x
3. Step 3: Cross multiply
   250,587x = 388,611 × 388,611
4. Step 4: Simplify right side
   250,587x = 151,018,509,321
5. Step 5: Solve for x
   x = 151,018,509,321/250,587
6. Step 6: Final answer
   x = 602,658.99