Finding the Fourth Proportional to 113,383.40, 156,485.94 and 65,638.76

Step by Step Solution

1. Step 1: Write the proportion equation
   113,383.40 : 156,485.94 = 65,638.76 : x
2. Step 2: Convert to fraction form
   113,383.40/156,485.94 = 65,638.76/x
3. Step 3: Cross multiply
   113,383.40x = 156,485.94 × 65,638.76
4. Step 4: Simplify right side
   113,383.40x = 10,271,543,059.03
5. Step 5: Solve for x
   x = 10,271,543,059.03/113,383.40
6. Step 6: Final answer
   x = 90,591.24