Finding the Fourth Proportional to 113,183.52, 156,202.56 and 72,981

Step by Step Solution

1. Step 1: Write the proportion equation
   113,183.52 : 156,202.56 = 72,981 : x
2. Step 2: Convert to fraction form
   113,183.52/156,202.56 = 72,981/x
3. Step 3: Cross multiply
   113,183.52x = 156,202.56 × 72,981
4. Step 4: Simplify right side
   113,183.52x = 11,399,819,031.36
5. Step 5: Solve for x
   x = 11,399,819,031.36/113,183.52
6. Step 6: Final answer
   x = 100,719.78