Finding the Fourth Proportional to 90.72, 125.37 and 67.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90.72 : 125.37 = 67.50 : x
2. Step 2: Convert to fraction form
   90.72/125.37 = 67.50/x
3. Step 3: Cross multiply
   90.72x = 125.37 × 67.50
4. Step 4: Simplify right side
   90.72x = 8,462.48
5. Step 5: Solve for x
   x = 8,462.48/90.72
6. Step 6: Final answer
   x = 93.28