Finding the Fourth Proportional to 22,308.48, 30,784.32 and 13,356.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,308.48 : 30,784.32 = 13,356.72 : x
2. Step 2: Convert to fraction form
   22,308.48/30,784.32 = 13,356.72/x
3. Step 3: Cross multiply
   22,308.48x = 30,784.32 × 13,356.72
4. Step 4: Simplify right side
   22,308.48x = 411,177,542.63
5. Step 5: Solve for x
   x = 411,177,542.63/22,308.48
6. Step 6: Final answer
   x = 18,431.45