Finding the Fourth Proportional to 288,123.71, 397,617.11 and 159,061.89

Step by Step Solution

1. Step 1: Write the proportion equation
   288,123.71 : 397,617.11 = 159,061.89 : x
2. Step 2: Convert to fraction form
   288,123.71/397,617.11 = 159,061.89/x
3. Step 3: Cross multiply
   288,123.71x = 397,617.11 × 159,061.89
4. Step 4: Simplify right side
   288,123.71x = 63,245,729,012.94
5. Step 5: Solve for x
   x = 63,245,729,012.94/288,123.71
6. Step 6: Final answer
   x = 219,508.94