Finding the Fourth Proportional to 189,399.12, 261,385.56 and 108,854.76

Step by Step Solution

1. Step 1: Write the proportion equation
   189,399.12 : 261,385.56 = 108,854.76 : x
2. Step 2: Convert to fraction form
   189,399.12/261,385.56 = 108,854.76/x
3. Step 3: Cross multiply
   189,399.12x = 261,385.56 × 108,854.76
4. Step 4: Simplify right side
   189,399.12x = 28,453,062,401.27
5. Step 5: Solve for x
   x = 28,453,062,401.27/189,399.12
6. Step 6: Final answer
   x = 150,228.06