Finding the Fourth Proportional to 259,047.87, 388,624.20 and 109,288.49

Step by Step Solution

1. Step 1: Write the proportion equation
   259,047.87 : 388,624.20 = 109,288.49 : x
2. Step 2: Convert to fraction form
   259,047.87/388,624.20 = 109,288.49/x
3. Step 3: Cross multiply
   259,047.87x = 388,624.20 × 109,288.49
4. Step 4: Simplify right side
   259,047.87x = 42,472,150,052.34
5. Step 5: Solve for x
   x = 42,472,150,052.34/259,047.87
6. Step 6: Final answer
   x = 163,954.83