Finding the Fourth Proportional to 83.86, 115.72 and 59.25

Step by Step Solution

1. Step 1: Write the proportion equation
   83.86 : 115.72 = 59.25 : x
2. Step 2: Convert to fraction form
   83.86/115.72 = 59.25/x
3. Step 3: Cross multiply
   83.86x = 115.72 × 59.25
4. Step 4: Simplify right side
   83.86x = 6,856.41
5. Step 5: Solve for x
   x = 6,856.41/83.86
6. Step 6: Final answer
   x = 81.76