Finding the Third Proportional to 331,487 and 725,667.50

Step by Step Solution

1. Step 1: Write the proportion equation
   331,487 : 725,667.50 = 725,667.50 : x
2. Step 2: Convert to fraction form
   331,487/725,667.50 = 725,667.50/x
3. Step 3: Cross multiply
   331,487x = 725,667.50 × 725,667.50
4. Step 4: Simplify right side
   331,487x = 526,593,320,556.25
5. Step 5: Solve for x
   x = 526,593,320,556.25/331,487
6. Step 6: Final answer
   x = 1,588,579.10