Finding the Fourth Proportional to 89,597.14, 123,377.40 and 87,608.20

Step by Step Solution

1. Step 1: Write the proportion equation
   89,597.14 : 123,377.40 = 87,608.20 : x
2. Step 2: Convert to fraction form
   89,597.14/123,377.40 = 87,608.20/x
3. Step 3: Cross multiply
   89,597.14x = 123,377.40 × 87,608.20
4. Step 4: Simplify right side
   89,597.14x = 10,808,871,934.68
5. Step 5: Solve for x
   x = 10,808,871,934.68/89,597.14
6. Step 6: Final answer
   x = 120,638.58