Finding the Fourth Proportional to 126,638.82, 189,899.91 and 71,234.82

Step by Step Solution

1. Step 1: Write the proportion equation
   126,638.82 : 189,899.91 = 71,234.82 : x
2. Step 2: Convert to fraction form
   126,638.82/189,899.91 = 71,234.82/x
3. Step 3: Cross multiply
   126,638.82x = 189,899.91 × 71,234.82
4. Step 4: Simplify right side
   126,638.82x = 13,527,485,906.87
5. Step 5: Solve for x
   x = 13,527,485,906.87/126,638.82
6. Step 6: Final answer
   x = 106,819.42