Finding the Fourth Proportional to 67.01, 100.31 and 56.12

Step by Step Solution

1. Step 1: Write the proportion equation
   67.01 : 100.31 = 56.12 : x
2. Step 2: Convert to fraction form
   67.01/100.31 = 56.12/x
3. Step 3: Cross multiply
   67.01x = 100.31 × 56.12
4. Step 4: Simplify right side
   67.01x = 5,629.40
5. Step 5: Solve for x
   x = 5,629.40/67.01
6. Step 6: Final answer
   x = 84.01