Finding the Fourth Proportional to 22,359.60, 30,856.29 and 12,288.77

Step by Step Solution

1. Step 1: Write the proportion equation
   22,359.60 : 30,856.29 = 12,288.77 : x
2. Step 2: Convert to fraction form
   22,359.60/30,856.29 = 12,288.77/x
3. Step 3: Cross multiply
   22,359.60x = 30,856.29 × 12,288.77
4. Step 4: Simplify right side
   22,359.60x = 379,185,696.58
5. Step 5: Solve for x
   x = 379,185,696.58/22,359.60
6. Step 6: Final answer
   x = 16,958.52