Finding the Third Proportional to 320,297 and 680,101.50

Step by Step Solution

1. Step 1: Write the proportion equation
   320,297 : 680,101.50 = 680,101.50 : x
2. Step 2: Convert to fraction form
   320,297/680,101.50 = 680,101.50/x
3. Step 3: Cross multiply
   320,297x = 680,101.50 × 680,101.50
4. Step 4: Simplify right side
   320,297x = 462,538,050,302.25
5. Step 5: Solve for x
   x = 462,538,050,302.25/320,297
6. Step 6: Final answer
   x = 1,444,091.11