Finding the Third Proportional to 329,228 and 721,368.50

Step by Step Solution

1. Step 1: Write the proportion equation
   329,228 : 721,368.50 = 721,368.50 : x
2. Step 2: Convert to fraction form
   329,228/721,368.50 = 721,368.50/x
3. Step 3: Cross multiply
   329,228x = 721,368.50 × 721,368.50
4. Step 4: Simplify right side
   329,228x = 520,372,512,792.25
5. Step 5: Solve for x
   x = 520,372,512,792.25/329,228
6. Step 6: Final answer
   x = 1,580,584.01