Finding the Fourth Proportional to 561,061.98, 774,174.78 and 319,348.26

Step by Step Solution

1. Step 1: Write the proportion equation
   561,061.98 : 774,174.78 = 319,348.26 : x
2. Step 2: Convert to fraction form
   561,061.98/774,174.78 = 319,348.26/x
3. Step 3: Cross multiply
   561,061.98x = 774,174.78 × 319,348.26
4. Step 4: Simplify right side
   561,061.98x = 247,231,368,928.88
5. Step 5: Solve for x
   x = 247,231,368,928.88/561,061.98
6. Step 6: Final answer
   x = 440,648.94