Finding the Third Proportional to 355,671 and 839,605.50

Step by Step Solution

1. Step 1: Write the proportion equation
   355,671 : 839,605.50 = 839,605.50 : x
2. Step 2: Convert to fraction form
   355,671/839,605.50 = 839,605.50/x
3. Step 3: Cross multiply
   355,671x = 839,605.50 × 839,605.50
4. Step 4: Simplify right side
   355,671x = 704,937,395,630.25
5. Step 5: Solve for x
   x = 704,937,395,630.25/355,671
6. Step 6: Final answer
   x = 1,981,992.90