Finding the Fourth Proportional to 191.34, 286.61 and 109.98

Step by Step Solution

1. Step 1: Write the proportion equation
   191.34 : 286.61 = 109.98 : x
2. Step 2: Convert to fraction form
   191.34/286.61 = 109.98/x
3. Step 3: Cross multiply
   191.34x = 286.61 × 109.98
4. Step 4: Simplify right side
   191.34x = 31,520.82
5. Step 5: Solve for x
   x = 31,520.82/191.34
6. Step 6: Final answer
   x = 164.74