Finding the Fourth Proportional to 22,336.60, 30,830.04 and 12,910.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,336.60 : 30,830.04 = 12,910.60 : x
2. Step 2: Convert to fraction form
   22,336.60/30,830.04 = 12,910.60/x
3. Step 3: Cross multiply
   22,336.60x = 30,830.04 × 12,910.60
4. Step 4: Simplify right side
   22,336.60x = 398,034,314.42
5. Step 5: Solve for x
   x = 398,034,314.42/22,336.60
6. Step 6: Final answer
   x = 17,819.83