Finding the Third Proportional to 455,478 and 723,766.50

Step by Step Solution

1. Step 1: Write the proportion equation
   455,478 : 723,766.50 = 723,766.50 : x
2. Step 2: Convert to fraction form
   455,478/723,766.50 = 723,766.50/x
3. Step 3: Cross multiply
   455,478x = 723,766.50 × 723,766.50
4. Step 4: Simplify right side
   455,478x = 523,837,946,522.25
5. Step 5: Solve for x
   x = 523,837,946,522.25/455,478
6. Step 6: Final answer
   x = 1,150,083.97