Finding the Fourth Proportional to 12,919.14, 17,830.37 and 7,886.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,919.14 : 17,830.37 = 7,886.29 : x
2. Step 2: Convert to fraction form
   12,919.14/17,830.37 = 7,886.29/x
3. Step 3: Cross multiply
   12,919.14x = 17,830.37 × 7,886.29
4. Step 4: Simplify right side
   12,919.14x = 140,615,468.63
5. Step 5: Solve for x
   x = 140,615,468.63/12,919.14
6. Step 6: Final answer
   x = 10,884.27