Finding the Fourth Proportional to 67.74, 101.05 and 56.98

Step by Step Solution

1. Step 1: Write the proportion equation
   67.74 : 101.05 = 56.98 : x
2. Step 2: Convert to fraction form
   67.74/101.05 = 56.98/x
3. Step 3: Cross multiply
   67.74x = 101.05 × 56.98
4. Step 4: Simplify right side
   67.74x = 5,757.83
5. Step 5: Solve for x
   x = 5,757.83/67.74
6. Step 6: Final answer
   x = 85.00