Finding the Third Proportional to 355,591 and 839,405.50

Step by Step Solution

1. Step 1: Write the proportion equation
   355,591 : 839,405.50 = 839,405.50 : x
2. Step 2: Convert to fraction form
   355,591/839,405.50 = 839,405.50/x
3. Step 3: Cross multiply
   355,591x = 839,405.50 × 839,405.50
4. Step 4: Simplify right side
   355,591x = 704,601,593,430.25
5. Step 5: Solve for x
   x = 704,601,593,430.25/355,591
6. Step 6: Final answer
   x = 1,981,494.45