Finding the Fourth Proportional to 22,428.16, 30,949.38 and 13,470.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,428.16 : 30,949.38 = 13,470.34 : x
2. Step 2: Convert to fraction form
   22,428.16/30,949.38 = 13,470.34/x
3. Step 3: Cross multiply
   22,428.16x = 30,949.38 × 13,470.34
4. Step 4: Simplify right side
   22,428.16x = 416,898,671.39
5. Step 5: Solve for x
   x = 416,898,671.39/22,428.16
6. Step 6: Final answer
   x = 18,588.18