Finding the Fourth Proportional to 13,147.93, 18,141.96 and 7,840.81

Step by Step Solution

1. Step 1: Write the proportion equation
   13,147.93 : 18,141.96 = 7,840.81 : x
2. Step 2: Convert to fraction form
   13,147.93/18,141.96 = 7,840.81/x
3. Step 3: Cross multiply
   13,147.93x = 18,141.96 × 7,840.81
4. Step 4: Simplify right side
   13,147.93x = 142,247,661.39
5. Step 5: Solve for x
   x = 142,247,661.39/13,147.93
6. Step 6: Final answer
   x = 10,819.02