Finding the Fourth Proportional to 123.79, 185.71 and 58.79

Step by Step Solution

1. Step 1: Write the proportion equation
   123.79 : 185.71 = 58.79 : x
2. Step 2: Convert to fraction form
   123.79/185.71 = 58.79/x
3. Step 3: Cross multiply
   123.79x = 185.71 × 58.79
4. Step 4: Simplify right side
   123.79x = 10,917.89
5. Step 5: Solve for x
   x = 10,917.89/123.79
6. Step 6: Final answer
   x = 88.20