Finding the Third Proportional to 2,398.50 and 4,221

Step by Step Solution

1. Step 1: Write the proportion equation
   2,398.50 : 4,221 = 4,221 : x
2. Step 2: Convert to fraction form
   2,398.50/4,221 = 4,221/x
3. Step 3: Cross multiply
   2,398.50x = 4,221 × 4,221
4. Step 4: Simplify right side
   2,398.50x = 17,816,841
5. Step 5: Solve for x
   x = 17,816,841/2,398.50
6. Step 6: Final answer
   x = 7,428.33