Finding the Fourth Proportional to 13,081.74, 18,053.33 and 7,113.39

Step by Step Solution

1. Step 1: Write the proportion equation
   13,081.74 : 18,053.33 = 7,113.39 : x
2. Step 2: Convert to fraction form
   13,081.74/18,053.33 = 7,113.39/x
3. Step 3: Cross multiply
   13,081.74x = 18,053.33 × 7,113.39
4. Step 4: Simplify right side
   13,081.74x = 128,420,341.52
5. Step 5: Solve for x
   x = 128,420,341.52/13,081.74
6. Step 6: Final answer
   x = 9,816.76