Finding the Fourth Proportional to 13,806.81, 19,046.91 and 8,499.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,806.81 : 19,046.91 = 8,499.69 : x
2. Step 2: Convert to fraction form
   13,806.81/19,046.91 = 8,499.69/x
3. Step 3: Cross multiply
   13,806.81x = 19,046.91 × 8,499.69
4. Step 4: Simplify right side
   13,806.81x = 161,892,830.46
5. Step 5: Solve for x
   x = 161,892,830.46/13,806.81
6. Step 6: Final answer
   x = 11,725.58