Finding the Third Proportional to 356,846.50 and 521,031.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,846.50 : 521,031.50 = 521,031.50 : x
2. Step 2: Convert to fraction form
   356,846.50/521,031.50 = 521,031.50/x
3. Step 3: Cross multiply
   356,846.50x = 521,031.50 × 521,031.50
4. Step 4: Simplify right side
   356,846.50x = 271,473,823,992.25
5. Step 5: Solve for x
   x = 271,473,823,992.25/356,846.50
6. Step 6: Final answer
   x = 760,757.98