Finding the Third Proportional to 288,849.75 and 623,373

Step by Step Solution

1. Step 1: Write the proportion equation
   288,849.75 : 623,373 = 623,373 : x
2. Step 2: Convert to fraction form
   288,849.75/623,373 = 623,373/x
3. Step 3: Cross multiply
   288,849.75x = 623,373 × 623,373
4. Step 4: Simplify right side
   288,849.75x = 388,593,897,129
5. Step 5: Solve for x
   x = 388,593,897,129/288,849.75
6. Step 6: Final answer
   x = 1,345,314.99