Finding the Fourth Proportional to 139.09, 191.82 and 109.93

Step by Step Solution

1. Step 1: Write the proportion equation
   139.09 : 191.82 = 109.93 : x
2. Step 2: Convert to fraction form
   139.09/191.82 = 109.93/x
3. Step 3: Cross multiply
   139.09x = 191.82 × 109.93
4. Step 4: Simplify right side
   139.09x = 21,086.77
5. Step 5: Solve for x
   x = 21,086.77/139.09
6. Step 6: Final answer
   x = 151.61