Finding the Third Proportional to 638,391 and 965,200.50

Step by Step Solution

1. Step 1: Write the proportion equation
   638,391 : 965,200.50 = 965,200.50 : x
2. Step 2: Convert to fraction form
   638,391/965,200.50 = 965,200.50/x
3. Step 3: Cross multiply
   638,391x = 965,200.50 × 965,200.50
4. Step 4: Simplify right side
   638,391x = 931,612,005,200.25
5. Step 5: Solve for x
   x = 931,612,005,200.25/638,391
6. Step 6: Final answer
   x = 1,459,312.56