Finding the Third Proportional to 285,061.50 and 619,405.50

Step by Step Solution

1. Step 1: Write the proportion equation
   285,061.50 : 619,405.50 = 619,405.50 : x
2. Step 2: Convert to fraction form
   285,061.50/619,405.50 = 619,405.50/x
3. Step 3: Cross multiply
   285,061.50x = 619,405.50 × 619,405.50
4. Step 4: Simplify right side
   285,061.50x = 383,663,173,430.25
5. Step 5: Solve for x
   x = 383,663,173,430.25/285,061.50
6. Step 6: Final answer
   x = 1,345,896.14