Finding the Fourth Proportional to 9,970.89, 13,744.72 and 8,199.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,970.89 : 13,744.72 = 8,199.42 : x
2. Step 2: Convert to fraction form
   9,970.89/13,744.72 = 8,199.42/x
3. Step 3: Cross multiply
   9,970.89x = 13,744.72 × 8,199.42
4. Step 4: Simplify right side
   9,970.89x = 112,698,732.06
5. Step 5: Solve for x
   x = 112,698,732.06/9,970.89
6. Step 6: Final answer
   x = 11,302.78