Finding the Third Proportional to 287,898 and 619,534.50

Step by Step Solution

1. Step 1: Write the proportion equation
   287,898 : 619,534.50 = 619,534.50 : x
2. Step 2: Convert to fraction form
   287,898/619,534.50 = 619,534.50/x
3. Step 3: Cross multiply
   287,898x = 619,534.50 × 619,534.50
4. Step 4: Simplify right side
   287,898x = 383,822,996,690.25
5. Step 5: Solve for x
   x = 383,822,996,690.25/287,898
6. Step 6: Final answer
   x = 1,333,190.91