Finding the Fourth Proportional to 105.79, 145.94 and 62.10

Step by Step Solution

1. Step 1: Write the proportion equation
   105.79 : 145.94 = 62.10 : x
2. Step 2: Convert to fraction form
   105.79/145.94 = 62.10/x
3. Step 3: Cross multiply
   105.79x = 145.94 × 62.10
4. Step 4: Simplify right side
   105.79x = 9,061.83
5. Step 5: Solve for x
   x = 9,061.83/105.79
6. Step 6: Final answer
   x = 85.66