Finding the Fourth Proportional to 89.19, 123.01 and 78.25

Step by Step Solution

1. Step 1: Write the proportion equation
   89.19 : 123.01 = 78.25 : x
2. Step 2: Convert to fraction form
   89.19/123.01 = 78.25/x
3. Step 3: Cross multiply
   89.19x = 123.01 × 78.25
4. Step 4: Simplify right side
   89.19x = 9,625.53
5. Step 5: Solve for x
   x = 9,625.53/89.19
6. Step 6: Final answer
   x = 107.92