Finding the Fourth Proportional to 67.08, 100.50 and 56.18

Step by Step Solution

1. Step 1: Write the proportion equation
   67.08 : 100.50 = 56.18 : x
2. Step 2: Convert to fraction form
   67.08/100.50 = 56.18/x
3. Step 3: Cross multiply
   67.08x = 100.50 × 56.18
4. Step 4: Simplify right side
   67.08x = 5,645.81
5. Step 5: Solve for x
   x = 5,645.81/67.08
6. Step 6: Final answer
   x = 84.17