Finding the Fourth Proportional to 13,428.27, 18,476.78 and 13,084.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,428.27 : 18,476.78 = 13,084.83 : x
2. Step 2: Convert to fraction form
   13,428.27/18,476.78 = 13,084.83/x
3. Step 3: Cross multiply
   13,428.27x = 18,476.78 × 13,084.83
4. Step 4: Simplify right side
   13,428.27x = 241,765,459.82
5. Step 5: Solve for x
   x = 241,765,459.82/13,428.27
6. Step 6: Final answer
   x = 18,004.21