Finding the Fourth Proportional to 21,480.78, 29,641.49 and 12,047.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,480.78 : 29,641.49 = 12,047.52 : x
2. Step 2: Convert to fraction form
   21,480.78/29,641.49 = 12,047.52/x
3. Step 3: Cross multiply
   21,480.78x = 29,641.49 × 12,047.52
4. Step 4: Simplify right side
   21,480.78x = 357,106,383.37
5. Step 5: Solve for x
   x = 357,106,383.37/21,480.78
6. Step 6: Final answer
   x = 16,624.46