Finding the Third Proportional to 42.56 and 55.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42.56 : 55.88 = 55.88 : x
2. Step 2: Convert to fraction form
   42.56/55.88 = 55.88/x
3. Step 3: Cross multiply
   42.56x = 55.88 × 55.88
4. Step 4: Simplify right side
   42.56x = 3,122.02
5. Step 5: Solve for x
   x = 3,122.02/42.56
6. Step 6: Final answer
   x = 73.35