Finding the Fourth Proportional to 13,081.98, 18,053.05 and 7,113.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,081.98 : 18,053.05 = 7,113.54 : x
2. Step 2: Convert to fraction form
   13,081.98/18,053.05 = 7,113.54/x
3. Step 3: Cross multiply
   13,081.98x = 18,053.05 × 7,113.54
4. Step 4: Simplify right side
   13,081.98x = 128,421,093.30
5. Step 5: Solve for x
   x = 128,421,093.30/13,081.98
6. Step 6: Final answer
   x = 9,816.64