Finding the Fourth Proportional to 13,821.39, 19,071.59 and 8,156.37

Step by Step Solution

1. Step 1: Write the proportion equation
   13,821.39 : 19,071.59 = 8,156.37 : x
2. Step 2: Convert to fraction form
   13,821.39/19,071.59 = 8,156.37/x
3. Step 3: Cross multiply
   13,821.39x = 19,071.59 × 8,156.37
4. Step 4: Simplify right side
   13,821.39x = 155,554,944.53
5. Step 5: Solve for x
   x = 155,554,944.53/13,821.39
6. Step 6: Final answer
   x = 11,254.65