Finding the Fourth Proportional to 72.68, 108.89 and 52.07

Step by Step Solution

1. Step 1: Write the proportion equation
   72.68 : 108.89 = 52.07 : x
2. Step 2: Convert to fraction form
   72.68/108.89 = 52.07/x
3. Step 3: Cross multiply
   72.68x = 108.89 × 52.07
4. Step 4: Simplify right side
   72.68x = 5,669.64
5. Step 5: Solve for x
   x = 5,669.64/72.68
6. Step 6: Final answer
   x = 78.01