Finding the Fourth Proportional to 69.83, 96.37 and 42.20

Step by Step Solution

1. Step 1: Write the proportion equation
   69.83 : 96.37 = 42.20 : x
2. Step 2: Convert to fraction form
   69.83/96.37 = 42.20/x
3. Step 3: Cross multiply
   69.83x = 96.37 × 42.20
4. Step 4: Simplify right side
   69.83x = 4,066.32
5. Step 5: Solve for x
   x = 4,066.32/69.83
6. Step 6: Final answer
   x = 58.23