Finding the Fourth Proportional to 69.72, 96.23 and 42.10

Step by Step Solution

1. Step 1: Write the proportion equation
   69.72 : 96.23 = 42.10 : x
2. Step 2: Convert to fraction form
   69.72/96.23 = 42.10/x
3. Step 3: Cross multiply
   69.72x = 96.23 × 42.10
4. Step 4: Simplify right side
   69.72x = 4,051.28
5. Step 5: Solve for x
   x = 4,051.28/69.72
6. Step 6: Final answer
   x = 58.11