Finding the Third Proportional to 399,349.50 and 868,668

Step by Step Solution

1. Step 1: Write the proportion equation
   399,349.50 : 868,668 = 868,668 : x
2. Step 2: Convert to fraction form
   399,349.50/868,668 = 868,668/x
3. Step 3: Cross multiply
   399,349.50x = 868,668 × 868,668
4. Step 4: Simplify right side
   399,349.50x = 754,584,094,224
5. Step 5: Solve for x
   x = 754,584,094,224/399,349.50
6. Step 6: Final answer
   x = 1,889,533.09