Finding the Fourth Proportional to 72.86, 109.17 and 48.75

Step by Step Solution

1. Step 1: Write the proportion equation
   72.86 : 109.17 = 48.75 : x
2. Step 2: Convert to fraction form
   72.86/109.17 = 48.75/x
3. Step 3: Cross multiply
   72.86x = 109.17 × 48.75
4. Step 4: Simplify right side
   72.86x = 5,322.04
5. Step 5: Solve for x
   x = 5,322.04/72.86
6. Step 6: Final answer
   x = 73.05