Finding the Fourth Proportional to 70.72, 105.50 and 59.38

Step by Step Solution

1. Step 1: Write the proportion equation
   70.72 : 105.50 = 59.38 : x
2. Step 2: Convert to fraction form
   70.72/105.50 = 59.38/x
3. Step 3: Cross multiply
   70.72x = 105.50 × 59.38
4. Step 4: Simplify right side
   70.72x = 6,264.59
5. Step 5: Solve for x
   x = 6,264.59/70.72
6. Step 6: Final answer
   x = 88.58