Finding the Fourth Proportional to 126,261.21, 189,147.59 and 105,754.50

Step by Step Solution

1. Step 1: Write the proportion equation
   126,261.21 : 189,147.59 = 105,754.50 : x
2. Step 2: Convert to fraction form
   126,261.21/189,147.59 = 105,754.50/x
3. Step 3: Cross multiply
   126,261.21x = 189,147.59 × 105,754.50
4. Step 4: Simplify right side
   126,261.21x = 20,003,207,332.14
5. Step 5: Solve for x
   x = 20,003,207,332.14/126,261.21
6. Step 6: Final answer
   x = 158,427.19