Finding the Third Proportional to 448,407 and 747,343.50

Step by Step Solution

1. Step 1: Write the proportion equation
   448,407 : 747,343.50 = 747,343.50 : x
2. Step 2: Convert to fraction form
   448,407/747,343.50 = 747,343.50/x
3. Step 3: Cross multiply
   448,407x = 747,343.50 × 747,343.50
4. Step 4: Simplify right side
   448,407x = 558,522,306,992.25
5. Step 5: Solve for x
   x = 558,522,306,992.25/448,407
6. Step 6: Final answer
   x = 1,245,570.00