Finding the Third Proportional to 666,424 and 1,439,036

Step by Step Solution

1. Step 1: Write the proportion equation
   666,424 : 1,439,036 = 1,439,036 : x
2. Step 2: Convert to fraction form
   666,424/1,439,036 = 1,439,036/x
3. Step 3: Cross multiply
   666,424x = 1,439,036 × 1,439,036
4. Step 4: Simplify right side
   666,424x = 2,070,824,609,296
5. Step 5: Solve for x
   x = 2,070,824,609,296/666,424
6. Step 6: Final answer
   x = 3,107,368.00