Finding the Third Proportional to 399,174 and 602,904

Step by Step Solution

1. Step 1: Write the proportion equation
   399,174 : 602,904 = 602,904 : x
2. Step 2: Convert to fraction form
   399,174/602,904 = 602,904/x
3. Step 3: Cross multiply
   399,174x = 602,904 × 602,904
4. Step 4: Simplify right side
   399,174x = 363,493,233,216
5. Step 5: Solve for x
   x = 363,493,233,216/399,174
6. Step 6: Final answer
   x = 910,613.50