Finding the Fourth Proportional to 91.83, 137.78 and 40.52

Step by Step Solution

1. Step 1: Write the proportion equation
   91.83 : 137.78 = 40.52 : x
2. Step 2: Convert to fraction form
   91.83/137.78 = 40.52/x
3. Step 3: Cross multiply
   91.83x = 137.78 × 40.52
4. Step 4: Simplify right side
   91.83x = 5,582.25
5. Step 5: Solve for x
   x = 5,582.25/91.83
6. Step 6: Final answer
   x = 60.79