Finding the Third Proportional to 356,346 and 756,418.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,346 : 756,418.50 = 756,418.50 : x
2. Step 2: Convert to fraction form
   356,346/756,418.50 = 756,418.50/x
3. Step 3: Cross multiply
   356,346x = 756,418.50 × 756,418.50
4. Step 4: Simplify right side
   356,346x = 572,168,947,142.25
5. Step 5: Solve for x
   x = 572,168,947,142.25/356,346
6. Step 6: Final answer
   x = 1,605,655.59