Finding the Third Proportional to 290,436.38 and 629,124

Step by Step Solution

1. Step 1: Write the proportion equation
   290,436.38 : 629,124 = 629,124 : x
2. Step 2: Convert to fraction form
   290,436.38/629,124 = 629,124/x
3. Step 3: Cross multiply
   290,436.38x = 629,124 × 629,124
4. Step 4: Simplify right side
   290,436.38x = 395,797,007,376
5. Step 5: Solve for x
   x = 395,797,007,376/290,436.38
6. Step 6: Final answer
   x = 1,362,766.66