Finding the Fourth Proportional to 113,082.72, 156,056.64 and 64,020.24

Step by Step Solution

1. Step 1: Write the proportion equation
   113,082.72 : 156,056.64 = 64,020.24 : x
2. Step 2: Convert to fraction form
   113,082.72/156,056.64 = 64,020.24/x
3. Step 3: Cross multiply
   113,082.72x = 156,056.64 × 64,020.24
4. Step 4: Simplify right side
   113,082.72x = 9,990,783,546.39
5. Step 5: Solve for x
   x = 9,990,783,546.39/113,082.72
6. Step 6: Final answer
   x = 88,349.34