Finding the Third Proportional to 416,280 and 624,478.50

Step by Step Solution

1. Step 1: Write the proportion equation
   416,280 : 624,478.50 = 624,478.50 : x
2. Step 2: Convert to fraction form
   416,280/624,478.50 = 624,478.50/x
3. Step 3: Cross multiply
   416,280x = 624,478.50 × 624,478.50
4. Step 4: Simplify right side
   416,280x = 389,973,396,962.25
5. Step 5: Solve for x
   x = 389,973,396,962.25/416,280
6. Step 6: Final answer
   x = 936,805.51