Finding the Third Proportional to 285,061.50 and 619,407

Step by Step Solution

1. Step 1: Write the proportion equation
   285,061.50 : 619,407 = 619,407 : x
2. Step 2: Convert to fraction form
   285,061.50/619,407 = 619,407/x
3. Step 3: Cross multiply
   285,061.50x = 619,407 × 619,407
4. Step 4: Simplify right side
   285,061.50x = 383,665,031,649
5. Step 5: Solve for x
   x = 383,665,031,649/285,061.50
6. Step 6: Final answer
   x = 1,345,902.66