Finding the Fourth Proportional to 13,100.22, 18,078.38 and 7,131.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,100.22 : 18,078.38 = 7,131.89 : x
2. Step 2: Convert to fraction form
   13,100.22/18,078.38 = 7,131.89/x
3. Step 3: Cross multiply
   13,100.22x = 18,078.38 × 7,131.89
4. Step 4: Simplify right side
   13,100.22x = 128,932,891.49
5. Step 5: Solve for x
   x = 128,932,891.49/13,100.22
6. Step 6: Final answer
   x = 9,842.04