Finding the Third Proportional to 423,010 and 647,893.50

Step by Step Solution

1. Step 1: Write the proportion equation
   423,010 : 647,893.50 = 647,893.50 : x
2. Step 2: Convert to fraction form
   423,010/647,893.50 = 647,893.50/x
3. Step 3: Cross multiply
   423,010x = 647,893.50 × 647,893.50
4. Step 4: Simplify right side
   423,010x = 419,765,987,342.25
5. Step 5: Solve for x
   x = 419,765,987,342.25/423,010
6. Step 6: Final answer
   x = 992,331.12