Finding the Fourth Proportional to 90.72, 125.01 and 83.52

Step by Step Solution

1. Step 1: Write the proportion equation
   90.72 : 125.01 = 83.52 : x
2. Step 2: Convert to fraction form
   90.72/125.01 = 83.52/x
3. Step 3: Cross multiply
   90.72x = 125.01 × 83.52
4. Step 4: Simplify right side
   90.72x = 10,440.84
5. Step 5: Solve for x
   x = 10,440.84/90.72
6. Step 6: Final answer
   x = 115.09