Finding the Fourth Proportional to 9,879.37, 13,633.89 and 5,402.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,879.37 : 13,633.89 = 5,402.86 : x
2. Step 2: Convert to fraction form
   9,879.37/13,633.89 = 5,402.86/x
3. Step 3: Cross multiply
   9,879.37x = 13,633.89 × 5,402.86
4. Step 4: Simplify right side
   9,879.37x = 73,661,998.93
5. Step 5: Solve for x
   x = 73,661,998.93/9,879.37
6. Step 6: Final answer
   x = 7,456.14