Finding the Fourth Proportional to 105.24, 145.23 and 61.59

Step by Step Solution

1. Step 1: Write the proportion equation
   105.24 : 145.23 = 61.59 : x
2. Step 2: Convert to fraction form
   105.24/145.23 = 61.59/x
3. Step 3: Cross multiply
   105.24x = 145.23 × 61.59
4. Step 4: Simplify right side
   105.24x = 8,944.72
5. Step 5: Solve for x
   x = 8,944.72/105.24
6. Step 6: Final answer
   x = 84.99