Finding the Fourth Proportional to 123.83, 185.83 and 42.74

Step by Step Solution

1. Step 1: Write the proportion equation
   123.83 : 185.83 = 42.74 : x
2. Step 2: Convert to fraction form
   123.83/185.83 = 42.74/x
3. Step 3: Cross multiply
   123.83x = 185.83 × 42.74
4. Step 4: Simplify right side
   123.83x = 7,941.34
5. Step 5: Solve for x
   x = 7,941.34/123.83
6. Step 6: Final answer
   x = 64.13