Finding the Fourth Proportional to 72.67, 109.01 and 47.15

Step by Step Solution

1. Step 1: Write the proportion equation
   72.67 : 109.01 = 47.15 : x
2. Step 2: Convert to fraction form
   72.67/109.01 = 47.15/x
3. Step 3: Cross multiply
   72.67x = 109.01 × 47.15
4. Step 4: Simplify right side
   72.67x = 5,139.82
5. Step 5: Solve for x
   x = 5,139.82/72.67
6. Step 6: Final answer
   x = 70.73