Finding the Fourth Proportional to 185.83, 256.55 and 123.86

Step by Step Solution

1. Step 1: Write the proportion equation
   185.83 : 256.55 = 123.86 : x
2. Step 2: Convert to fraction form
   185.83/256.55 = 123.86/x
3. Step 3: Cross multiply
   185.83x = 256.55 × 123.86
4. Step 4: Simplify right side
   185.83x = 31,776.31
5. Step 5: Solve for x
   x = 31,776.31/185.83
6. Step 6: Final answer
   x = 171.00