Finding the Third Proportional to 287,605.50 and 619,362

Step by Step Solution

1. Step 1: Write the proportion equation
   287,605.50 : 619,362 = 619,362 : x
2. Step 2: Convert to fraction form
   287,605.50/619,362 = 619,362/x
3. Step 3: Cross multiply
   287,605.50x = 619,362 × 619,362
4. Step 4: Simplify right side
   287,605.50x = 383,609,287,044
5. Step 5: Solve for x
   x = 383,609,287,044/287,605.50
6. Step 6: Final answer
   x = 1,333,803.72