Finding the Fourth Proportional to 426,123.58, 639,429.59 and 173,357.41

Step by Step Solution

1. Step 1: Write the proportion equation
   426,123.58 : 639,429.59 = 173,357.41 : x
2. Step 2: Convert to fraction form
   426,123.58/639,429.59 = 173,357.41/x
3. Step 3: Cross multiply
   426,123.58x = 639,429.59 × 173,357.41
4. Step 4: Simplify right side
   426,123.58x = 110,849,856,732.98
5. Step 5: Solve for x
   x = 110,849,856,732.98/426,123.58
6. Step 6: Final answer
   x = 260,135.47