Finding the Third Proportional to 412,353 and 638,482.50

Step by Step Solution

1. Step 1: Write the proportion equation
   412,353 : 638,482.50 = 638,482.50 : x
2. Step 2: Convert to fraction form
   412,353/638,482.50 = 638,482.50/x
3. Step 3: Cross multiply
   412,353x = 638,482.50 × 638,482.50
4. Step 4: Simplify right side
   412,353x = 407,659,902,806.25
5. Step 5: Solve for x
   x = 407,659,902,806.25/412,353
6. Step 6: Final answer
   x = 988,618.74