Finding the Fourth Proportional to 109.88, 151.72 and 68.50

Step by Step Solution

1. Step 1: Write the proportion equation
   109.88 : 151.72 = 68.50 : x
2. Step 2: Convert to fraction form
   109.88/151.72 = 68.50/x
3. Step 3: Cross multiply
   109.88x = 151.72 × 68.50
4. Step 4: Simplify right side
   109.88x = 10,393.22
5. Step 5: Solve for x
   x = 10,393.22/109.88
6. Step 6: Final answer
   x = 94.59