Finding the Fourth Proportional to 12,875.83, 17,772.92 and 7,843.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,875.83 : 17,772.92 = 7,843.30 : x
2. Step 2: Convert to fraction form
   12,875.83/17,772.92 = 7,843.30/x
3. Step 3: Cross multiply
   12,875.83x = 17,772.92 × 7,843.30
4. Step 4: Simplify right side
   12,875.83x = 139,398,289.20
5. Step 5: Solve for x
   x = 139,398,289.20/12,875.83
6. Step 6: Final answer
   x = 10,826.36