Finding the Third Proportional to 289,359 and 634,744.50

Step by Step Solution

1. Step 1: Write the proportion equation
   289,359 : 634,744.50 = 634,744.50 : x
2. Step 2: Convert to fraction form
   289,359/634,744.50 = 634,744.50/x
3. Step 3: Cross multiply
   289,359x = 634,744.50 × 634,744.50
4. Step 4: Simplify right side
   289,359x = 402,900,580,280.25
5. Step 5: Solve for x
   x = 402,900,580,280.25/289,359
6. Step 6: Final answer
   x = 1,392,390.01