Finding the Third Proportional to 425,248 and 685,184

Step by Step Solution

1. Step 1: Write the proportion equation
   425,248 : 685,184 = 685,184 : x
2. Step 2: Convert to fraction form
   425,248/685,184 = 685,184/x
3. Step 3: Cross multiply
   425,248x = 685,184 × 685,184
4. Step 4: Simplify right side
   425,248x = 469,477,113,856
5. Step 5: Solve for x
   x = 469,477,113,856/425,248
6. Step 6: Final answer
   x = 1,104,007.81