Finding the Third Proportional to 424,098 and 623,443.50

Step by Step Solution

1. Step 1: Write the proportion equation
   424,098 : 623,443.50 = 623,443.50 : x
2. Step 2: Convert to fraction form
   424,098/623,443.50 = 623,443.50/x
3. Step 3: Cross multiply
   424,098x = 623,443.50 × 623,443.50
4. Step 4: Simplify right side
   424,098x = 388,681,797,692.25
5. Step 5: Solve for x
   x = 388,681,797,692.25/424,098
6. Step 6: Final answer
   x = 916,490.52