Finding the Fourth Proportional to 89.51, 123.63 and 67.77

Step by Step Solution

1. Step 1: Write the proportion equation
   89.51 : 123.63 = 67.77 : x
2. Step 2: Convert to fraction form
   89.51/123.63 = 67.77/x
3. Step 3: Cross multiply
   89.51x = 123.63 × 67.77
4. Step 4: Simplify right side
   89.51x = 8,378.15
5. Step 5: Solve for x
   x = 8,378.15/89.51
6. Step 6: Final answer
   x = 93.61