Finding the Fourth Proportional to 88.94, 123.47 and 86.81

Step by Step Solution

1. Step 1: Write the proportion equation
   88.94 : 123.47 = 86.81 : x
2. Step 2: Convert to fraction form
   88.94/123.47 = 86.81/x
3. Step 3: Cross multiply
   88.94x = 123.47 × 86.81
4. Step 4: Simplify right side
   88.94x = 10,718.43
5. Step 5: Solve for x
   x = 10,718.43/88.94
6. Step 6: Final answer
   x = 120.51