Finding the Third Proportional to 418,689 and 614,425.50

Step by Step Solution

1. Step 1: Write the proportion equation
   418,689 : 614,425.50 = 614,425.50 : x
2. Step 2: Convert to fraction form
   418,689/614,425.50 = 614,425.50/x
3. Step 3: Cross multiply
   418,689x = 614,425.50 × 614,425.50
4. Step 4: Simplify right side
   418,689x = 377,518,695,050.25
5. Step 5: Solve for x
   x = 377,518,695,050.25/418,689
6. Step 6: Final answer
   x = 901,668.53