Finding the Third Proportional to 276,712.50 and 417,003

Step by Step Solution

1. Step 1: Write the proportion equation
   276,712.50 : 417,003 = 417,003 : x
2. Step 2: Convert to fraction form
   276,712.50/417,003 = 417,003/x
3. Step 3: Cross multiply
   276,712.50x = 417,003 × 417,003
4. Step 4: Simplify right side
   276,712.50x = 173,891,502,009
5. Step 5: Solve for x
   x = 173,891,502,009/276,712.50
6. Step 6: Final answer
   x = 628,419.40