Finding the Fourth Proportional to 89.80, 123.82 and 62.19

Step by Step Solution

1. Step 1: Write the proportion equation
   89.80 : 123.82 = 62.19 : x
2. Step 2: Convert to fraction form
   89.80/123.82 = 62.19/x
3. Step 3: Cross multiply
   89.80x = 123.82 × 62.19
4. Step 4: Simplify right side
   89.80x = 7,700.37
5. Step 5: Solve for x
   x = 7,700.37/89.80
6. Step 6: Final answer
   x = 85.75