Finding the Fourth Proportional to 42.51, 58.31 and 42.14

Step by Step Solution

1. Step 1: Write the proportion equation
   42.51 : 58.31 = 42.14 : x
2. Step 2: Convert to fraction form
   42.51/58.31 = 42.14/x
3. Step 3: Cross multiply
   42.51x = 58.31 × 42.14
4. Step 4: Simplify right side
   42.51x = 2,457.35
5. Step 5: Solve for x
   x = 2,457.35/42.51
6. Step 6: Final answer
   x = 57.81