Finding the Fourth Proportional to 72.82, 109.27 and 46.78

Step by Step Solution

1. Step 1: Write the proportion equation
   72.82 : 109.27 = 46.78 : x
2. Step 2: Convert to fraction form
   72.82/109.27 = 46.78/x
3. Step 3: Cross multiply
   72.82x = 109.27 × 46.78
4. Step 4: Simplify right side
   72.82x = 5,111.57
5. Step 5: Solve for x
   x = 5,111.57/72.82
6. Step 6: Final answer
   x = 70.19