Finding the Fourth Proportional to 123.31, 184.81 and 58.31

Step by Step Solution

1. Step 1: Write the proportion equation
   123.31 : 184.81 = 58.31 : x
2. Step 2: Convert to fraction form
   123.31/184.81 = 58.31/x
3. Step 3: Cross multiply
   123.31x = 184.81 × 58.31
4. Step 4: Simplify right side
   123.31x = 10,776.27
5. Step 5: Solve for x
   x = 10,776.27/123.31
6. Step 6: Final answer
   x = 87.39