Finding the Third Proportional to 276,203 and 418,040.50

Step by Step Solution

1. Step 1: Write the proportion equation
   276,203 : 418,040.50 = 418,040.50 : x
2. Step 2: Convert to fraction form
   276,203/418,040.50 = 418,040.50/x
3. Step 3: Cross multiply
   276,203x = 418,040.50 × 418,040.50
4. Step 4: Simplify right side
   276,203x = 174,757,859,640.25
5. Step 5: Solve for x
   x = 174,757,859,640.25/276,203
6. Step 6: Final answer
   x = 632,715.28