Finding the Fourth Proportional to 13,919.61, 19,209.78 and 7,951.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,919.61 : 19,209.78 = 7,951.94 : x
2. Step 2: Convert to fraction form
   13,919.61/19,209.78 = 7,951.94/x
3. Step 3: Cross multiply
   13,919.61x = 19,209.78 × 7,951.94
4. Step 4: Simplify right side
   13,919.61x = 152,755,017.97
5. Step 5: Solve for x
   x = 152,755,017.97/13,919.61
6. Step 6: Final answer
   x = 10,974.09