Finding the Fourth Proportional to 19,443.50, 29,169.57 and 7,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,443.50 : 29,169.57 = 7,131.50 : x
2. Step 2: Convert to fraction form
   19,443.50/29,169.57 = 7,131.50/x
3. Step 3: Cross multiply
   19,443.50x = 29,169.57 × 7,131.50
4. Step 4: Simplify right side
   19,443.50x = 208,022,788.46
5. Step 5: Solve for x
   x = 208,022,788.46/19,443.50
6. Step 6: Final answer
   x = 10,698.83