Finding the Fourth Proportional to 22,345.74, 30,828.54 and 12,783.69

Step by Step Solution

1. Step 1: Write the proportion equation
   22,345.74 : 30,828.54 = 12,783.69 : x
2. Step 2: Convert to fraction form
   22,345.74/30,828.54 = 12,783.69/x
3. Step 3: Cross multiply
   22,345.74x = 30,828.54 × 12,783.69
4. Step 4: Simplify right side
   22,345.74x = 394,102,498.51
5. Step 5: Solve for x
   x = 394,102,498.51/22,345.74
6. Step 6: Final answer
   x = 17,636.58