Finding the Third Proportional to 2,128.75 and 4,653.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.75 : 4,653.50 = 4,653.50 : x
2. Step 2: Convert to fraction form
   2,128.75/4,653.50 = 4,653.50/x
3. Step 3: Cross multiply
   2,128.75x = 4,653.50 × 4,653.50
4. Step 4: Simplify right side
   2,128.75x = 21,655,062.25
5. Step 5: Solve for x
   x = 21,655,062.25/2,128.75
6. Step 6: Final answer
   x = 10,172.67