Finding the Fourth Proportional to 11,860.06, 16,369.14 and 7,819.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,860.06 : 16,369.14 = 7,819.78 : x
2. Step 2: Convert to fraction form
   11,860.06/16,369.14 = 7,819.78/x
3. Step 3: Cross multiply
   11,860.06x = 16,369.14 × 7,819.78
4. Step 4: Simplify right side
   11,860.06x = 128,003,073.59
5. Step 5: Solve for x
   x = 128,003,073.59/11,860.06
6. Step 6: Final answer
   x = 10,792.78