Finding the Third Proportional to 307,413 and 660,754.50

Step by Step Solution

1. Step 1: Write the proportion equation
   307,413 : 660,754.50 = 660,754.50 : x
2. Step 2: Convert to fraction form
   307,413/660,754.50 = 660,754.50/x
3. Step 3: Cross multiply
   307,413x = 660,754.50 × 660,754.50
4. Step 4: Simplify right side
   307,413x = 436,596,509,270.25
5. Step 5: Solve for x
   x = 436,596,509,270.25/307,413
6. Step 6: Final answer
   x = 1,420,227.87