Finding the Fourth Proportional to 13,409.82, 18,507.42 and 7,743.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,409.82 : 18,507.42 = 7,743.42 : x
2. Step 2: Convert to fraction form
   13,409.82/18,507.42 = 7,743.42/x
3. Step 3: Cross multiply
   13,409.82x = 18,507.42 × 7,743.42
4. Step 4: Simplify right side
   13,409.82x = 143,310,726.18
5. Step 5: Solve for x
   x = 143,310,726.18/13,409.82
6. Step 6: Final answer
   x = 10,687.00