Finding the Fourth Proportional to 22,370.28, 30,870.20 and 12,298.65

Step by Step Solution

1. Step 1: Write the proportion equation
   22,370.28 : 30,870.20 = 12,298.65 : x
2. Step 2: Convert to fraction form
   22,370.28/30,870.20 = 12,298.65/x
3. Step 3: Cross multiply
   22,370.28x = 30,870.20 × 12,298.65
4. Step 4: Simplify right side
   22,370.28x = 379,661,785.23
5. Step 5: Solve for x
   x = 379,661,785.23/22,370.28
6. Step 6: Final answer
   x = 16,971.70