Finding the Fourth Proportional to 9,879.74, 13,634.01 and 5,342.39

Step by Step Solution

1. Step 1: Write the proportion equation
   9,879.74 : 13,634.01 = 5,342.39 : x
2. Step 2: Convert to fraction form
   9,879.74/13,634.01 = 5,342.39/x
3. Step 3: Cross multiply
   9,879.74x = 13,634.01 × 5,342.39
4. Step 4: Simplify right side
   9,879.74x = 72,838,137.89
5. Step 5: Solve for x
   x = 72,838,137.89/9,879.74
6. Step 6: Final answer
   x = 7,372.48