Finding the Third Proportional to 666,423 and 1,439,034

Step by Step Solution

1. Step 1: Write the proportion equation
   666,423 : 1,439,034 = 1,439,034 : x
2. Step 2: Convert to fraction form
   666,423/1,439,034 = 1,439,034/x
3. Step 3: Cross multiply
   666,423x = 1,439,034 × 1,439,034
4. Step 4: Simplify right side
   666,423x = 2,070,818,853,156
5. Step 5: Solve for x
   x = 2,070,818,853,156/666,423
6. Step 6: Final answer
   x = 3,107,364.02