Finding the Fourth Proportional to 72.98, 109.37 and 52.60

Step by Step Solution

1. Step 1: Write the proportion equation
   72.98 : 109.37 = 52.60 : x
2. Step 2: Convert to fraction form
   72.98/109.37 = 52.60/x
3. Step 3: Cross multiply
   72.98x = 109.37 × 52.60
4. Step 4: Simplify right side
   72.98x = 5,752.72
5. Step 5: Solve for x
   x = 5,752.72/72.98
6. Step 6: Final answer
   x = 78.82