Finding the Third Proportional to 290,635.50 and 443,487

Step by Step Solution

1. Step 1: Write the proportion equation
   290,635.50 : 443,487 = 443,487 : x
2. Step 2: Convert to fraction form
   290,635.50/443,487 = 443,487/x
3. Step 3: Cross multiply
   290,635.50x = 443,487 × 443,487
4. Step 4: Simplify right side
   290,635.50x = 196,680,719,169
5. Step 5: Solve for x
   x = 196,680,719,169/290,635.50
6. Step 6: Final answer
   x = 676,726.41