Finding the Fourth Proportional to 288,818.46, 433,228.89 and 189,606.42

Step by Step Solution

1. Step 1: Write the proportion equation
   288,818.46 : 433,228.89 = 189,606.42 : x
2. Step 2: Convert to fraction form
   288,818.46/433,228.89 = 189,606.42/x
3. Step 3: Cross multiply
   288,818.46x = 433,228.89 × 189,606.42
4. Step 4: Simplify right side
   288,818.46x = 82,142,978,873.47
5. Step 5: Solve for x
   x = 82,142,978,873.47/288,818.46
6. Step 6: Final answer
   x = 284,410.42