Finding the Third Proportional to 329,442.50 and 721,922.50

Step by Step Solution

1. Step 1: Write the proportion equation
   329,442.50 : 721,922.50 = 721,922.50 : x
2. Step 2: Convert to fraction form
   329,442.50/721,922.50 = 721,922.50/x
3. Step 3: Cross multiply
   329,442.50x = 721,922.50 × 721,922.50
4. Step 4: Simplify right side
   329,442.50x = 521,172,096,006.25
5. Step 5: Solve for x
   x = 521,172,096,006.25/329,442.50
6. Step 6: Final answer
   x = 1,581,981.97