Finding the Fourth Proportional to 300,575.78, 414,794.61 and 166,439.78

Step by Step Solution

1. Step 1: Write the proportion equation
   300,575.78 : 414,794.61 = 166,439.78 : x
2. Step 2: Convert to fraction form
   300,575.78/414,794.61 = 166,439.78/x
3. Step 3: Cross multiply
   300,575.78x = 414,794.61 × 166,439.78
4. Step 4: Simplify right side
   300,575.78x = 69,038,323,633.59
5. Step 5: Solve for x
   x = 69,038,323,633.59/300,575.78
6. Step 6: Final answer
   x = 229,686.92