Finding the Third Proportional to 3,510.50 and 5,121.75

Step by Step Solution

1. Step 1: Write the proportion equation
   3,510.50 : 5,121.75 = 5,121.75 : x
2. Step 2: Convert to fraction form
   3,510.50/5,121.75 = 5,121.75/x
3. Step 3: Cross multiply
   3,510.50x = 5,121.75 × 5,121.75
4. Step 4: Simplify right side
   3,510.50x = 26,232,323.06
5. Step 5: Solve for x
   x = 26,232,323.06/3,510.50
6. Step 6: Final answer
   x = 7,472.53