Finding the Fourth Proportional to 67.58, 100.88 and 56.19

Step by Step Solution

1. Step 1: Write the proportion equation
   67.58 : 100.88 = 56.19 : x
2. Step 2: Convert to fraction form
   67.58/100.88 = 56.19/x
3. Step 3: Cross multiply
   67.58x = 100.88 × 56.19
4. Step 4: Simplify right side
   67.58x = 5,668.59
5. Step 5: Solve for x
   x = 5,668.59/67.58
6. Step 6: Final answer
   x = 83.89