Finding the Fourth Proportional to 12,878.47, 19,315.42 and 5,856.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,878.47 : 19,315.42 = 5,856.83 : x
2. Step 2: Convert to fraction form
   12,878.47/19,315.42 = 5,856.83/x
3. Step 3: Cross multiply
   12,878.47x = 19,315.42 × 5,856.83
4. Step 4: Simplify right side
   12,878.47x = 113,127,131.32
5. Step 5: Solve for x
   x = 113,127,131.32/12,878.47
6. Step 6: Final answer
   x = 8,784.21