Finding the Third Proportional to 356,835 and 521,854.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,835 : 521,854.50 = 521,854.50 : x
2. Step 2: Convert to fraction form
   356,835/521,854.50 = 521,854.50/x
3. Step 3: Cross multiply
   356,835x = 521,854.50 × 521,854.50
4. Step 4: Simplify right side
   356,835x = 272,332,119,170.25
5. Step 5: Solve for x
   x = 272,332,119,170.25/356,835
6. Step 6: Final answer
   x = 763,187.80