Finding the Third Proportional to 290,125 and 443,528

Step by Step Solution

1. Step 1: Write the proportion equation
   290,125 : 443,528 = 443,528 : x
2. Step 2: Convert to fraction form
   290,125/443,528 = 443,528/x
3. Step 3: Cross multiply
   290,125x = 443,528 × 443,528
4. Step 4: Simplify right side
   290,125x = 196,717,086,784
5. Step 5: Solve for x
   x = 196,717,086,784/290,125
6. Step 6: Final answer
   x = 678,042.52