Finding the Fourth Proportional to 72.98, 109.25 and 47.22

Step by Step Solution

1. Step 1: Write the proportion equation
   72.98 : 109.25 = 47.22 : x
2. Step 2: Convert to fraction form
   72.98/109.25 = 47.22/x
3. Step 3: Cross multiply
   72.98x = 109.25 × 47.22
4. Step 4: Simplify right side
   72.98x = 5,158.55
5. Step 5: Solve for x
   x = 5,158.55/72.98
6. Step 6: Final answer
   x = 70.69