Finding the Fourth Proportional to 67.23, 100.72 and 58.57

Step by Step Solution

1. Step 1: Write the proportion equation
   67.23 : 100.72 = 58.57 : x
2. Step 2: Convert to fraction form
   67.23/100.72 = 58.57/x
3. Step 3: Cross multiply
   67.23x = 100.72 × 58.57
4. Step 4: Simplify right side
   67.23x = 5,898.37
5. Step 5: Solve for x
   x = 5,898.37/67.23
6. Step 6: Final answer
   x = 87.74