Finding the Fourth Proportional to 13,100.41, 18,078.68 and 7,132.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,100.41 : 18,078.68 = 7,132.12 : x
2. Step 2: Convert to fraction form
   13,100.41/18,078.68 = 7,132.12/x
3. Step 3: Cross multiply
   13,100.41x = 18,078.68 × 7,132.12
4. Step 4: Simplify right side
   13,100.41x = 128,939,279.54
5. Step 5: Solve for x
   x = 128,939,279.54/13,100.41
6. Step 6: Final answer
   x = 9,842.39