Finding the Fourth Proportional to 89.52, 123.61 and 67.80

Step by Step Solution

1. Step 1: Write the proportion equation
   89.52 : 123.61 = 67.80 : x
2. Step 2: Convert to fraction form
   89.52/123.61 = 67.80/x
3. Step 3: Cross multiply
   89.52x = 123.61 × 67.80
4. Step 4: Simplify right side
   89.52x = 8,380.76
5. Step 5: Solve for x
   x = 8,380.76/89.52
6. Step 6: Final answer
   x = 93.62