Finding the Third Proportional to 666,520 and 1,439,504

Step by Step Solution

1. Step 1: Write the proportion equation
   666,520 : 1,439,504 = 1,439,504 : x
2. Step 2: Convert to fraction form
   666,520/1,439,504 = 1,439,504/x
3. Step 3: Cross multiply
   666,520x = 1,439,504 × 1,439,504
4. Step 4: Simplify right side
   666,520x = 2,072,171,766,016
5. Step 5: Solve for x
   x = 2,072,171,766,016/666,520
6. Step 6: Final answer
   x = 3,108,941.62