Finding the Fourth Proportional to 85.47, 118.05 and 62.12

Step by Step Solution

1. Step 1: Write the proportion equation
   85.47 : 118.05 = 62.12 : x
2. Step 2: Convert to fraction form
   85.47/118.05 = 62.12/x
3. Step 3: Cross multiply
   85.47x = 118.05 × 62.12
4. Step 4: Simplify right side
   85.47x = 7,333.27
5. Step 5: Solve for x
   x = 7,333.27/85.47
6. Step 6: Final answer
   x = 85.80