Finding the Fourth Proportional to 109.33, 150.83 and 72.47

Step by Step Solution

1. Step 1: Write the proportion equation
   109.33 : 150.83 = 72.47 : x
2. Step 2: Convert to fraction form
   109.33/150.83 = 72.47/x
3. Step 3: Cross multiply
   109.33x = 150.83 × 72.47
4. Step 4: Simplify right side
   109.33x = 10,931.21
5. Step 5: Solve for x
   x = 10,931.21/109.33
6. Step 6: Final answer
   x = 99.99