Finding the Fourth Proportional to 72.82, 109.02 and 47.17

Step by Step Solution

1. Step 1: Write the proportion equation
   72.82 : 109.02 = 47.17 : x
2. Step 2: Convert to fraction form
   72.82/109.02 = 47.17/x
3. Step 3: Cross multiply
   72.82x = 109.02 × 47.17
4. Step 4: Simplify right side
   72.82x = 5,141.93
5. Step 5: Solve for x
   x = 5,141.93/72.82
6. Step 6: Final answer
   x = 70.62