Finding the Fourth Proportional to 72.77, 109.05 and 49.61

Step by Step Solution

1. Step 1: Write the proportion equation
   72.77 : 109.05 = 49.61 : x
2. Step 2: Convert to fraction form
   72.77/109.05 = 49.61/x
3. Step 3: Cross multiply
   72.77x = 109.05 × 49.61
4. Step 4: Simplify right side
   72.77x = 5,410.34
5. Step 5: Solve for x
   x = 5,410.34/72.77
6. Step 6: Final answer
   x = 74.35