Finding the Fourth Proportional to 22,308.04, 30,785.15 and 12,876.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,308.04 : 30,785.15 = 12,876.60 : x
2. Step 2: Convert to fraction form
   22,308.04/30,785.15 = 12,876.60/x
3. Step 3: Cross multiply
   22,308.04x = 30,785.15 × 12,876.60
4. Step 4: Simplify right side
   22,308.04x = 396,408,062.49
5. Step 5: Solve for x
   x = 396,408,062.49/22,308.04
6. Step 6: Final answer
   x = 17,769.74