Finding the Third Proportional to 455,574 and 679,666.50

Step by Step Solution

1. Step 1: Write the proportion equation
   455,574 : 679,666.50 = 679,666.50 : x
2. Step 2: Convert to fraction form
   455,574/679,666.50 = 679,666.50/x
3. Step 3: Cross multiply
   455,574x = 679,666.50 × 679,666.50
4. Step 4: Simplify right side
   455,574x = 461,946,551,222.25
5. Step 5: Solve for x
   x = 461,946,551,222.25/455,574
6. Step 6: Final answer
   x = 1,013,987.96