Finding the Fourth Proportional to 89.48, 133.93 and 78.59

Step by Step Solution

1. Step 1: Write the proportion equation
   89.48 : 133.93 = 78.59 : x
2. Step 2: Convert to fraction form
   89.48/133.93 = 78.59/x
3. Step 3: Cross multiply
   89.48x = 133.93 × 78.59
4. Step 4: Simplify right side
   89.48x = 10,525.39
5. Step 5: Solve for x
   x = 10,525.39/89.48
6. Step 6: Final answer
   x = 117.63