Finding the Fourth Proportional to 42.47, 58.69 and 30.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42.47 : 58.69 = 30.25 : x
2. Step 2: Convert to fraction form
   42.47/58.69 = 30.25/x
3. Step 3: Cross multiply
   42.47x = 58.69 × 30.25
4. Step 4: Simplify right side
   42.47x = 1,775.37
5. Step 5: Solve for x
   x = 1,775.37/42.47
6. Step 6: Final answer
   x = 41.80