Finding the Fourth Proportional to 67.76, 101.62 and 56.42

Step by Step Solution

1. Step 1: Write the proportion equation
   67.76 : 101.62 = 56.42 : x
2. Step 2: Convert to fraction form
   67.76/101.62 = 56.42/x
3. Step 3: Cross multiply
   67.76x = 101.62 × 56.42
4. Step 4: Simplify right side
   67.76x = 5,733.40
5. Step 5: Solve for x
   x = 5,733.40/67.76
6. Step 6: Final answer
   x = 84.61