Finding the Fourth Proportional to 59.31, 81.74 and 42.03

Step by Step Solution

1. Step 1: Write the proportion equation
   59.31 : 81.74 = 42.03 : x
2. Step 2: Convert to fraction form
   59.31/81.74 = 42.03/x
3. Step 3: Cross multiply
   59.31x = 81.74 × 42.03
4. Step 4: Simplify right side
   59.31x = 3,435.32
5. Step 5: Solve for x
   x = 3,435.32/59.31
6. Step 6: Final answer
   x = 57.92