Finding the Fourth Proportional to 42.60, 60.42 and 42.60

Step by Step Solution

1. Step 1: Write the proportion equation
   42.60 : 60.42 = 42.60 : x
2. Step 2: Convert to fraction form
   42.60/60.42 = 42.60/x
3. Step 3: Cross multiply
   42.60x = 60.42 × 42.60
4. Step 4: Simplify right side
   42.60x = 2,573.89
5. Step 5: Solve for x
   x = 2,573.89/42.60
6. Step 6: Final answer
   x = 60.42