Finding the Fourth Proportional to 89.63, 123.69 and 50.82

Step by Step Solution

1. Step 1: Write the proportion equation
   89.63 : 123.69 = 50.82 : x
2. Step 2: Convert to fraction form
   89.63/123.69 = 50.82/x
3. Step 3: Cross multiply
   89.63x = 123.69 × 50.82
4. Step 4: Simplify right side
   89.63x = 6,285.93
5. Step 5: Solve for x
   x = 6,285.93/89.63
6. Step 6: Final answer
   x = 70.14