Finding the Fourth Proportional to 123.98, 185.49 and 69.91

Step by Step Solution

1. Step 1: Write the proportion equation
   123.98 : 185.49 = 69.91 : x
2. Step 2: Convert to fraction form
   123.98/185.49 = 69.91/x
3. Step 3: Cross multiply
   123.98x = 185.49 × 69.91
4. Step 4: Simplify right side
   123.98x = 12,967.14
5. Step 5: Solve for x
   x = 12,967.14/123.98
6. Step 6: Final answer
   x = 104.59