Finding the Fourth Proportional to 13,518.28, 18,654.90 and 7,549.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,518.28 : 18,654.90 = 7,549.72 : x
2. Step 2: Convert to fraction form
   13,518.28/18,654.90 = 7,549.72/x
3. Step 3: Cross multiply
   13,518.28x = 18,654.90 × 7,549.72
4. Step 4: Simplify right side
   13,518.28x = 140,839,271.63
5. Step 5: Solve for x
   x = 140,839,271.63/13,518.28
6. Step 6: Final answer
   x = 10,418.43