Finding the Fourth Proportional to 103,528.27, 142,671.35 and 89,183.60

Step by Step Solution

1. Step 1: Write the proportion equation
   103,528.27 : 142,671.35 = 89,183.60 : x
2. Step 2: Convert to fraction form
   103,528.27/142,671.35 = 89,183.60/x
3. Step 3: Cross multiply
   103,528.27x = 142,671.35 × 89,183.60
4. Step 4: Simplify right side
   103,528.27x = 12,723,945,189.50
5. Step 5: Solve for x
   x = 12,723,945,189.50/103,528.27
6. Step 6: Final answer
   x = 122,903.10