Finding the Third Proportional to 715.50 and 1,087.50

Step by Step Solution

1. Step 1: Write the proportion equation
   715.50 : 1,087.50 = 1,087.50 : x
2. Step 2: Convert to fraction form
   715.50/1,087.50 = 1,087.50/x
3. Step 3: Cross multiply
   715.50x = 1,087.50 × 1,087.50
4. Step 4: Simplify right side
   715.50x = 1,182,656.25
5. Step 5: Solve for x
   x = 1,182,656.25/715.50
6. Step 6: Final answer
   x = 1,652.91