Finding the Third Proportional to 354,757 and 521,761.50

Step by Step Solution

1. Step 1: Write the proportion equation
   354,757 : 521,761.50 = 521,761.50 : x
2. Step 2: Convert to fraction form
   354,757/521,761.50 = 521,761.50/x
3. Step 3: Cross multiply
   354,757x = 521,761.50 × 521,761.50
4. Step 4: Simplify right side
   354,757x = 272,235,062,882.25
5. Step 5: Solve for x
   x = 272,235,062,882.25/354,757
6. Step 6: Final answer
   x = 767,384.61