Finding the Fourth Proportional to 72.69, 109.05 and 52.35

Step by Step Solution

1. Step 1: Write the proportion equation
   72.69 : 109.05 = 52.35 : x
2. Step 2: Convert to fraction form
   72.69/109.05 = 52.35/x
3. Step 3: Cross multiply
   72.69x = 109.05 × 52.35
4. Step 4: Simplify right side
   72.69x = 5,708.77
5. Step 5: Solve for x
   x = 5,708.77/72.69
6. Step 6: Final answer
   x = 78.54