Finding the Fourth Proportional to 109.53, 151.16 and 72.63

Step by Step Solution

1. Step 1: Write the proportion equation
   109.53 : 151.16 = 72.63 : x
2. Step 2: Convert to fraction form
   109.53/151.16 = 72.63/x
3. Step 3: Cross multiply
   109.53x = 151.16 × 72.63
4. Step 4: Simplify right side
   109.53x = 10,978.37
5. Step 5: Solve for x
   x = 10,978.37/109.53
6. Step 6: Final answer
   x = 100.23