Finding the Third Proportional to 56.81 and 88.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56.81 : 88.50 = 88.50 : x
2. Step 2: Convert to fraction form
   56.81/88.50 = 88.50/x
3. Step 3: Cross multiply
   56.81x = 88.50 × 88.50
4. Step 4: Simplify right side
   56.81x = 7,832.25
5. Step 5: Solve for x
   x = 7,832.25/56.81
6. Step 6: Final answer
   x = 137.86