Finding the Fourth Proportional to 109.48, 151.06 and 72.60

Step by Step Solution

1. Step 1: Write the proportion equation
   109.48 : 151.06 = 72.60 : x
2. Step 2: Convert to fraction form
   109.48/151.06 = 72.60/x
3. Step 3: Cross multiply
   109.48x = 151.06 × 72.60
4. Step 4: Simplify right side
   109.48x = 10,966.96
5. Step 5: Solve for x
   x = 10,966.96/109.48
6. Step 6: Final answer
   x = 100.17