Finding the Third Proportional to 3,528 and 7,781.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,528 : 7,781.50 = 7,781.50 : x
2. Step 2: Convert to fraction form
   3,528/7,781.50 = 7,781.50/x
3. Step 3: Cross multiply
   3,528x = 7,781.50 × 7,781.50
4. Step 4: Simplify right side
   3,528x = 60,551,742.25
5. Step 5: Solve for x
   x = 60,551,742.25/3,528
6. Step 6: Final answer
   x = 17,163.19