Finding the Fourth Proportional to 13,531.80, 18,673.98 and 7,563.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,531.80 : 18,673.98 = 7,563.72 : x
2. Step 2: Convert to fraction form
   13,531.80/18,673.98 = 7,563.72/x
3. Step 3: Cross multiply
   13,531.80x = 18,673.98 × 7,563.72
4. Step 4: Simplify right side
   13,531.80x = 141,244,756.01
5. Step 5: Solve for x
   x = 141,244,756.01/13,531.80
6. Step 6: Final answer
   x = 10,437.99