Finding the Fourth Proportional to 13,120.54, 18,112.41 and 7,741.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,120.54 : 18,112.41 = 7,741.15 : x
2. Step 2: Convert to fraction form
   13,120.54/18,112.41 = 7,741.15/x
3. Step 3: Cross multiply
   13,120.54x = 18,112.41 × 7,741.15
4. Step 4: Simplify right side
   13,120.54x = 140,210,837.39
5. Step 5: Solve for x
   x = 140,210,837.39/13,120.54
6. Step 6: Final answer
   x = 10,686.36