Finding the Third Proportional to 403,410 and 624,622.50

Step by Step Solution

1. Step 1: Write the proportion equation
   403,410 : 624,622.50 = 624,622.50 : x
2. Step 2: Convert to fraction form
   403,410/624,622.50 = 624,622.50/x
3. Step 3: Cross multiply
   403,410x = 624,622.50 × 624,622.50
4. Step 4: Simplify right side
   403,410x = 390,153,267,506.25
5. Step 5: Solve for x
   x = 390,153,267,506.25/403,410
6. Step 6: Final answer
   x = 967,138.31