Finding the Fourth Proportional to 426,316.82, 638,919.89 and 173,301.76

Step by Step Solution

1. Step 1: Write the proportion equation
   426,316.82 : 638,919.89 = 173,301.76 : x
2. Step 2: Convert to fraction form
   426,316.82/638,919.89 = 173,301.76/x
3. Step 3: Cross multiply
   426,316.82x = 638,919.89 × 173,301.76
4. Step 4: Simplify right side
   426,316.82x = 110,725,942,667.91
5. Step 5: Solve for x
   x = 110,725,942,667.91/426,316.82
6. Step 6: Final answer
   x = 259,726.90