Finding the Third Proportional to 370,818 and 809,311.50

Step by Step Solution

1. Step 1: Write the proportion equation
   370,818 : 809,311.50 = 809,311.50 : x
2. Step 2: Convert to fraction form
   370,818/809,311.50 = 809,311.50/x
3. Step 3: Cross multiply
   370,818x = 809,311.50 × 809,311.50
4. Step 4: Simplify right side
   370,818x = 654,985,104,032.25
5. Step 5: Solve for x
   x = 654,985,104,032.25/370,818
6. Step 6: Final answer
   x = 1,766,325.00