Finding the Fourth Proportional to 9,991.71, 13,790.24 and 9,548.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,991.71 : 13,790.24 = 9,548.84 : x
2. Step 2: Convert to fraction form
   9,991.71/13,790.24 = 9,548.84/x
3. Step 3: Cross multiply
   9,991.71x = 13,790.24 × 9,548.84
4. Step 4: Simplify right side
   9,991.71x = 131,680,795.32
5. Step 5: Solve for x
   x = 131,680,795.32/9,991.71
6. Step 6: Final answer
   x = 13,179.00