Finding the Fourth Proportional to 189,287.83, 261,216.69 and 108,720.55

Step by Step Solution

1. Step 1: Write the proportion equation
   189,287.83 : 261,216.69 = 108,720.55 : x
2. Step 2: Convert to fraction form
   189,287.83/261,216.69 = 108,720.55/x
3. Step 3: Cross multiply
   189,287.83x = 261,216.69 × 108,720.55
4. Step 4: Simplify right side
   189,287.83x = 28,399,622,205.98
5. Step 5: Solve for x
   x = 28,399,622,205.98/189,287.83
6. Step 6: Final answer
   x = 150,034.06