Finding the Fourth Proportional to 126,139.10, 189,471.90 and 106,456.10

Step by Step Solution

1. Step 1: Write the proportion equation
   126,139.10 : 189,471.90 = 106,456.10 : x
2. Step 2: Convert to fraction form
   126,139.10/189,471.90 = 106,456.10/x
3. Step 3: Cross multiply
   126,139.10x = 189,471.90 × 106,456.10
4. Step 4: Simplify right side
   126,139.10x = 20,170,439,533.59
5. Step 5: Solve for x
   x = 20,170,439,533.59/126,139.10
6. Step 6: Final answer
   x = 159,906.32