Finding the Fourth Proportional to 91.60, 137.34 and 42.83

Step by Step Solution

1. Step 1: Write the proportion equation
   91.60 : 137.34 = 42.83 : x
2. Step 2: Convert to fraction form
   91.60/137.34 = 42.83/x
3. Step 3: Cross multiply
   91.60x = 137.34 × 42.83
4. Step 4: Simplify right side
   91.60x = 5,882.09
5. Step 5: Solve for x
   x = 5,882.09/91.60
6. Step 6: Final answer
   x = 64.21