Finding the Third Proportional to 413,184 and 638,004

Step by Step Solution

1. Step 1: Write the proportion equation
   413,184 : 638,004 = 638,004 : x
2. Step 2: Convert to fraction form
   413,184/638,004 = 638,004/x
3. Step 3: Cross multiply
   413,184x = 638,004 × 638,004
4. Step 4: Simplify right side
   413,184x = 407,049,104,016
5. Step 5: Solve for x
   x = 407,049,104,016/413,184
6. Step 6: Final answer
   x = 985,152.15