Finding the Fourth Proportional to 123.31, 185.08 and 100.76

Step by Step Solution

1. Step 1: Write the proportion equation
   123.31 : 185.08 = 100.76 : x
2. Step 2: Convert to fraction form
   123.31/185.08 = 100.76/x
3. Step 3: Cross multiply
   123.31x = 185.08 × 100.76
4. Step 4: Simplify right side
   123.31x = 18,647.48
5. Step 5: Solve for x
   x = 18,647.48/123.31
6. Step 6: Final answer
   x = 151.23