Finding the Fourth Proportional to 189,198.52, 261,131.79 and 108,681.28

Step by Step Solution

1. Step 1: Write the proportion equation
   189,198.52 : 261,131.79 = 108,681.28 : x
2. Step 2: Convert to fraction form
   189,198.52/261,131.79 = 108,681.28/x
3. Step 3: Cross multiply
   189,198.52x = 261,131.79 × 108,681.28
4. Step 4: Simplify right side
   189,198.52x = 28,380,137,185.89
5. Step 5: Solve for x
   x = 28,380,137,185.89/189,198.52
6. Step 6: Final answer
   x = 150,001.90