Finding the Fourth Proportional to 426,472.49, 639,531.89 and 173,581.34

Step by Step Solution

1. Step 1: Write the proportion equation
   426,472.49 : 639,531.89 = 173,581.34 : x
2. Step 2: Convert to fraction form
   426,472.49/639,531.89 = 173,581.34/x
3. Step 3: Cross multiply
   426,472.49x = 639,531.89 × 173,581.34
4. Step 4: Simplify right side
   426,472.49x = 111,010,801,571.03
5. Step 5: Solve for x
   x = 111,010,801,571.03/426,472.49
6. Step 6: Final answer
   x = 260,300.03