Finding the Third Proportional to 638,404.50 and 1,370,890.50

Step by Step Solution

1. Step 1: Write the proportion equation
   638,404.50 : 1,370,890.50 = 1,370,890.50 : x
2. Step 2: Convert to fraction form
   638,404.50/1,370,890.50 = 1,370,890.50/x
3. Step 3: Cross multiply
   638,404.50x = 1,370,890.50 × 1,370,890.50
4. Step 4: Simplify right side
   638,404.50x = 1,879,340,762,990.25
5. Step 5: Solve for x
   x = 1,879,340,762,990.25/638,404.50
6. Step 6: Final answer
   x = 2,943,808.77