Finding the Fourth Proportional to 21,748.44, 30,012.96 and 12,796.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,748.44 : 30,012.96 = 12,796.32 : x
2. Step 2: Convert to fraction form
   21,748.44/30,012.96 = 12,796.32/x
3. Step 3: Cross multiply
   21,748.44x = 30,012.96 × 12,796.32
4. Step 4: Simplify right side
   21,748.44x = 384,055,440.31
5. Step 5: Solve for x
   x = 384,055,440.31/21,748.44
6. Step 6: Final answer
   x = 17,658.99