Finding the Fourth Proportional to 100.18, 150.59 and 92.31

Step by Step Solution

1. Step 1: Write the proportion equation
   100.18 : 150.59 = 92.31 : x
2. Step 2: Convert to fraction form
   100.18/150.59 = 92.31/x
3. Step 3: Cross multiply
   100.18x = 150.59 × 92.31
4. Step 4: Simplify right side
   100.18x = 13,900.96
5. Step 5: Solve for x
   x = 13,900.96/100.18
6. Step 6: Final answer
   x = 138.76