Finding the Third Proportional to 427,411.50 and 664,431

Step by Step Solution

1. Step 1: Write the proportion equation
   427,411.50 : 664,431 = 664,431 : x
2. Step 2: Convert to fraction form
   427,411.50/664,431 = 664,431/x
3. Step 3: Cross multiply
   427,411.50x = 664,431 × 664,431
4. Step 4: Simplify right side
   427,411.50x = 441,468,553,761
5. Step 5: Solve for x
   x = 441,468,553,761/427,411.50
6. Step 6: Final answer
   x = 1,032,888.81