Finding the Fourth Proportional to 109.74, 151.31 and 72.83

Step by Step Solution

1. Step 1: Write the proportion equation
   109.74 : 151.31 = 72.83 : x
2. Step 2: Convert to fraction form
   109.74/151.31 = 72.83/x
3. Step 3: Cross multiply
   109.74x = 151.31 × 72.83
4. Step 4: Simplify right side
   109.74x = 11,019.91
5. Step 5: Solve for x
   x = 11,019.91/109.74
6. Step 6: Final answer
   x = 100.42