Finding the Third Proportional to 378,650 and 820,385.50

Step by Step Solution

1. Step 1: Write the proportion equation
   378,650 : 820,385.50 = 820,385.50 : x
2. Step 2: Convert to fraction form
   378,650/820,385.50 = 820,385.50/x
3. Step 3: Cross multiply
   378,650x = 820,385.50 × 820,385.50
4. Step 4: Simplify right side
   378,650x = 673,032,368,610.25
5. Step 5: Solve for x
   x = 673,032,368,610.25/378,650
6. Step 6: Final answer
   x = 1,777,452.45