Finding the Fourth Proportional to 13,081.69, 18,052.48 and 7,113.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,081.69 : 18,052.48 = 7,113.31 : x
2. Step 2: Convert to fraction form
   13,081.69/18,052.48 = 7,113.31/x
3. Step 3: Cross multiply
   13,081.69x = 18,052.48 × 7,113.31
4. Step 4: Simplify right side
   13,081.69x = 128,412,886.51
5. Step 5: Solve for x
   x = 128,412,886.51/13,081.69
6. Step 6: Final answer
   x = 9,816.23