Finding the Third Proportional to 2,421.98 and 3,428.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,421.98 : 3,428.06 = 3,428.06 : x
2. Step 2: Convert to fraction form
   2,421.98/3,428.06 = 3,428.06/x
3. Step 3: Cross multiply
   2,421.98x = 3,428.06 × 3,428.06
4. Step 4: Simplify right side
   2,421.98x = 11,751,612.50
5. Step 5: Solve for x
   x = 11,751,612.50/2,421.98
6. Step 6: Final answer
   x = 4,852.06