Finding the Third Proportional to 250,141.50 and 387,909

Step by Step Solution

1. Step 1: Write the proportion equation
   250,141.50 : 387,909 = 387,909 : x
2. Step 2: Convert to fraction form
   250,141.50/387,909 = 387,909/x
3. Step 3: Cross multiply
   250,141.50x = 387,909 × 387,909
4. Step 4: Simplify right side
   250,141.50x = 150,473,392,281
5. Step 5: Solve for x
   x = 150,473,392,281/250,141.50
6. Step 6: Final answer
   x = 601,553.09