Finding the Fourth Proportional to 109.59, 151.31 and 100.34

Step by Step Solution

1. Step 1: Write the proportion equation
   109.59 : 151.31 = 100.34 : x
2. Step 2: Convert to fraction form
   109.59/151.31 = 100.34/x
3. Step 3: Cross multiply
   109.59x = 151.31 × 100.34
4. Step 4: Simplify right side
   109.59x = 15,181.94
5. Step 5: Solve for x
   x = 15,181.94/109.59
6. Step 6: Final answer
   x = 138.53