Finding the Fourth Proportional to 9,879.99, 13,634.59 and 5,404.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,879.99 : 13,634.59 = 5,404.03 : x
2. Step 2: Convert to fraction form
   9,879.99/13,634.59 = 5,404.03/x
3. Step 3: Cross multiply
   9,879.99x = 13,634.59 × 5,404.03
4. Step 4: Simplify right side
   9,879.99x = 73,681,757.43
5. Step 5: Solve for x
   x = 73,681,757.43/9,879.99
6. Step 6: Final answer
   x = 7,457.67