Finding the Fourth Proportional to 9,881.98, 13,630.71 and 6,339.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,881.98 : 13,630.71 = 6,339.58 : x
2. Step 2: Convert to fraction form
   9,881.98/13,630.71 = 6,339.58/x
3. Step 3: Cross multiply
   9,881.98x = 13,630.71 × 6,339.58
4. Step 4: Simplify right side
   9,881.98x = 86,412,976.50
5. Step 5: Solve for x
   x = 86,412,976.50/9,881.98
6. Step 6: Final answer
   x = 8,744.50