Finding the Fourth Proportional to 72.86, 109.37 and 52.69

Step by Step Solution

1. Step 1: Write the proportion equation
   72.86 : 109.37 = 52.69 : x
2. Step 2: Convert to fraction form
   72.86/109.37 = 52.69/x
3. Step 3: Cross multiply
   72.86x = 109.37 × 52.69
4. Step 4: Simplify right side
   72.86x = 5,762.56
5. Step 5: Solve for x
   x = 5,762.56/72.86
6. Step 6: Final answer
   x = 79.10