Finding the Third Proportional to 56.25 and 89.75

Step by Step Solution

1. Step 1: Write the proportion equation
   56.25 : 89.75 = 89.75 : x
2. Step 2: Convert to fraction form
   56.25/89.75 = 89.75/x
3. Step 3: Cross multiply
   56.25x = 89.75 × 89.75
4. Step 4: Simplify right side
   56.25x = 8,055.06
5. Step 5: Solve for x
   x = 8,055.06/56.25
6. Step 6: Final answer
   x = 143.20