Finding the Third Proportional to 294,328.50 and 623,718

Step by Step Solution

1. Step 1: Write the proportion equation
   294,328.50 : 623,718 = 623,718 : x
2. Step 2: Convert to fraction form
   294,328.50/623,718 = 623,718/x
3. Step 3: Cross multiply
   294,328.50x = 623,718 × 623,718
4. Step 4: Simplify right side
   294,328.50x = 389,024,143,524
5. Step 5: Solve for x
   x = 389,024,143,524/294,328.50
6. Step 6: Final answer
   x = 1,321,734.54