Finding the Fourth Proportional to 85.34, 117.69 and 62.10

Step by Step Solution

1. Step 1: Write the proportion equation
   85.34 : 117.69 = 62.10 : x
2. Step 2: Convert to fraction form
   85.34/117.69 = 62.10/x
3. Step 3: Cross multiply
   85.34x = 117.69 × 62.10
4. Step 4: Simplify right side
   85.34x = 7,308.55
5. Step 5: Solve for x
   x = 7,308.55/85.34
6. Step 6: Final answer
   x = 85.65