Finding the Fourth Proportional to 59.74, 89.91 and 58.12

Step by Step Solution

1. Step 1: Write the proportion equation
   59.74 : 89.91 = 58.12 : x
2. Step 2: Convert to fraction form
   59.74/89.91 = 58.12/x
3. Step 3: Cross multiply
   59.74x = 89.91 × 58.12
4. Step 4: Simplify right side
   59.74x = 5,225.34
5. Step 5: Solve for x
   x = 5,225.34/59.74
6. Step 6: Final answer
   x = 87.47