Finding the Third Proportional to 455,611 and 724,105.50

Step by Step Solution

1. Step 1: Write the proportion equation
   455,611 : 724,105.50 = 724,105.50 : x
2. Step 2: Convert to fraction form
   455,611/724,105.50 = 724,105.50/x
3. Step 3: Cross multiply
   455,611x = 724,105.50 × 724,105.50
4. Step 4: Simplify right side
   455,611x = 524,328,775,130.25
5. Step 5: Solve for x
   x = 524,328,775,130.25/455,611
6. Step 6: Final answer
   x = 1,150,825.54