Finding the Fourth Proportional to 72.50, 108.78 and 29.78

Step by Step Solution

1. Step 1: Write the proportion equation
   72.50 : 108.78 = 29.78 : x
2. Step 2: Convert to fraction form
   72.50/108.78 = 29.78/x
3. Step 3: Cross multiply
   72.50x = 108.78 × 29.78
4. Step 4: Simplify right side
   72.50x = 3,239.47
5. Step 5: Solve for x
   x = 3,239.47/72.50
6. Step 6: Final answer
   x = 44.68