Finding the Third Proportional to 485,437 and 728,156.50

Step by Step Solution

1. Step 1: Write the proportion equation
   485,437 : 728,156.50 = 728,156.50 : x
2. Step 2: Convert to fraction form
   485,437/728,156.50 = 728,156.50/x
3. Step 3: Cross multiply
   485,437x = 728,156.50 × 728,156.50
4. Step 4: Simplify right side
   485,437x = 530,211,888,492.25
5. Step 5: Solve for x
   x = 530,211,888,492.25/485,437
6. Step 6: Final answer
   x = 1,092,236.25