Finding the Third Proportional to 427,410 and 664,429.50

Step by Step Solution

1. Step 1: Write the proportion equation
   427,410 : 664,429.50 = 664,429.50 : x
2. Step 2: Convert to fraction form
   427,410/664,429.50 = 664,429.50/x
3. Step 3: Cross multiply
   427,410x = 664,429.50 × 664,429.50
4. Step 4: Simplify right side
   427,410x = 441,466,560,470.25
5. Step 5: Solve for x
   x = 441,466,560,470.25/427,410
6. Step 6: Final answer
   x = 1,032,887.77