Finding the Third Proportional to 639,554 and 1,385,092

Step by Step Solution

1. Step 1: Write the proportion equation
   639,554 : 1,385,092 = 1,385,092 : x
2. Step 2: Convert to fraction form
   639,554/1,385,092 = 1,385,092/x
3. Step 3: Cross multiply
   639,554x = 1,385,092 × 1,385,092
4. Step 4: Simplify right side
   639,554x = 1,918,479,848,464
5. Step 5: Solve for x
   x = 1,918,479,848,464/639,554
6. Step 6: Final answer
   x = 2,999,715.19