Finding the Fourth Proportional to 113,428.72, 156,546.48 and 65,049.60

Step by Step Solution

1. Step 1: Write the proportion equation
   113,428.72 : 156,546.48 = 65,049.60 : x
2. Step 2: Convert to fraction form
   113,428.72/156,546.48 = 65,049.60/x
3. Step 3: Cross multiply
   113,428.72x = 156,546.48 × 65,049.60
4. Step 4: Simplify right side
   113,428.72x = 10,183,285,905.41
5. Step 5: Solve for x
   x = 10,183,285,905.41/113,428.72
6. Step 6: Final answer
   x = 89,776.96