Finding the Fourth Proportional to 123.08, 169.82 and 71.32

Step by Step Solution

1. Step 1: Write the proportion equation
   123.08 : 169.82 = 71.32 : x
2. Step 2: Convert to fraction form
   123.08/169.82 = 71.32/x
3. Step 3: Cross multiply
   123.08x = 169.82 × 71.32
4. Step 4: Simplify right side
   123.08x = 12,111.56
5. Step 5: Solve for x
   x = 12,111.56/123.08
6. Step 6: Final answer
   x = 98.40