Finding the Fourth Proportional to 21,752.40, 30,016.88 and 12,798.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,752.40 : 30,016.88 = 12,798.16 : x
2. Step 2: Convert to fraction form
   21,752.40/30,016.88 = 12,798.16/x
3. Step 3: Cross multiply
   21,752.40x = 30,016.88 × 12,798.16
4. Step 4: Simplify right side
   21,752.40x = 384,160,832.94
5. Step 5: Solve for x
   x = 384,160,832.94/21,752.40
6. Step 6: Final answer
   x = 17,660.62