Finding the Fourth Proportional to 89.83, 124.51 and 88.30

Step by Step Solution

1. Step 1: Write the proportion equation
   89.83 : 124.51 = 88.30 : x
2. Step 2: Convert to fraction form
   89.83/124.51 = 88.30/x
3. Step 3: Cross multiply
   89.83x = 124.51 × 88.30
4. Step 4: Simplify right side
   89.83x = 10,994.23
5. Step 5: Solve for x
   x = 10,994.23/89.83
6. Step 6: Final answer
   x = 122.39