Finding the Fourth Proportional to 12,799.83, 17,671.94 and 12,178.35

Step by Step Solution

1. Step 1: Write the proportion equation
   12,799.83 : 17,671.94 = 12,178.35 : x
2. Step 2: Convert to fraction form
   12,799.83/17,671.94 = 12,178.35/x
3. Step 3: Cross multiply
   12,799.83x = 17,671.94 × 12,178.35
4. Step 4: Simplify right side
   12,799.83x = 215,215,070.50
5. Step 5: Solve for x
   x = 215,215,070.50/12,799.83
6. Step 6: Final answer
   x = 16,813.90