Finding the Third Proportional to 399,834 and 604,514.25

Step by Step Solution

1. Step 1: Write the proportion equation
   399,834 : 604,514.25 = 604,514.25 : x
2. Step 2: Convert to fraction form
   399,834/604,514.25 = 604,514.25/x
3. Step 3: Cross multiply
   399,834x = 604,514.25 × 604,514.25
4. Step 4: Simplify right side
   399,834x = 365,437,478,453.06
5. Step 5: Solve for x
   x = 365,437,478,453.06/399,834
6. Step 6: Final answer
   x = 913,972.99