Finding the Fourth Proportional to 89.31, 123.25 and 50.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89.31 : 123.25 = 50.50 : x
2. Step 2: Convert to fraction form
   89.31/123.25 = 50.50/x
3. Step 3: Cross multiply
   89.31x = 123.25 × 50.50
4. Step 4: Simplify right side
   89.31x = 6,224.13
5. Step 5: Solve for x
   x = 6,224.13/89.31
6. Step 6: Final answer
   x = 69.69