Finding the Fourth Proportional to 123.10, 184.72 and 71.76

Step by Step Solution

1. Step 1: Write the proportion equation
   123.10 : 184.72 = 71.76 : x
2. Step 2: Convert to fraction form
   123.10/184.72 = 71.76/x
3. Step 3: Cross multiply
   123.10x = 184.72 × 71.76
4. Step 4: Simplify right side
   123.10x = 13,255.33
5. Step 5: Solve for x
   x = 13,255.33/123.10
6. Step 6: Final answer
   x = 107.68