Finding the Third Proportional to 2,308.50 and 3,128.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.50 : 3,128.63 = 3,128.63 : x
2. Step 2: Convert to fraction form
   2,308.50/3,128.63 = 3,128.63/x
3. Step 3: Cross multiply
   2,308.50x = 3,128.63 × 3,128.63
4. Step 4: Simplify right side
   2,308.50x = 9,788,294.39
5. Step 5: Solve for x
   x = 9,788,294.39/2,308.50
6. Step 6: Final answer
   x = 4,240.11