Finding the Fourth Proportional to 426,145.34, 639,051.89 and 159,760.50

Step by Step Solution

1. Step 1: Write the proportion equation
   426,145.34 : 639,051.89 = 159,760.50 : x
2. Step 2: Convert to fraction form
   426,145.34/639,051.89 = 159,760.50/x
3. Step 3: Cross multiply
   426,145.34x = 639,051.89 × 159,760.50
4. Step 4: Simplify right side
   426,145.34x = 102,095,248,673.54
5. Step 5: Solve for x
   x = 102,095,248,673.54/426,145.34
6. Step 6: Final answer
   x = 239,578.47