Finding the Fourth Proportional to 9,146.71, 13,642.79 and 8,869.83

Step by Step Solution

1. Step 1: Write the proportion equation
   9,146.71 : 13,642.79 = 8,869.83 : x
2. Step 2: Convert to fraction form
   9,146.71/13,642.79 = 8,869.83/x
3. Step 3: Cross multiply
   9,146.71x = 13,642.79 × 8,869.83
4. Step 4: Simplify right side
   9,146.71x = 121,009,228.03
5. Step 5: Solve for x
   x = 121,009,228.03/9,146.71
6. Step 6: Final answer
   x = 13,229.81