Finding the Third Proportional to 638,322 and 945,158

Step by Step Solution

1. Step 1: Write the proportion equation
   638,322 : 945,158 = 945,158 : x
2. Step 2: Convert to fraction form
   638,322/945,158 = 945,158/x
3. Step 3: Cross multiply
   638,322x = 945,158 × 945,158
4. Step 4: Simplify right side
   638,322x = 893,323,644,964
5. Step 5: Solve for x
   x = 893,323,644,964/638,322
6. Step 6: Final answer
   x = 1,399,487.48