Finding the Third Proportional to 285,079.50 and 619,443

Step by Step Solution

1. Step 1: Write the proportion equation
   285,079.50 : 619,443 = 619,443 : x
2. Step 2: Convert to fraction form
   285,079.50/619,443 = 619,443/x
3. Step 3: Cross multiply
   285,079.50x = 619,443 × 619,443
4. Step 4: Simplify right side
   285,079.50x = 383,709,630,249
5. Step 5: Solve for x
   x = 383,709,630,249/285,079.50
6. Step 6: Final answer
   x = 1,345,974.12