Finding the Fourth Proportional to 13,071.78, 18,040.05 and 7,694.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,071.78 : 18,040.05 = 7,694.10 : x
2. Step 2: Convert to fraction form
   13,071.78/18,040.05 = 7,694.10/x
3. Step 3: Cross multiply
   13,071.78x = 18,040.05 × 7,694.10
4. Step 4: Simplify right side
   13,071.78x = 138,801,948.71
5. Step 5: Solve for x
   x = 138,801,948.71/13,071.78
6. Step 6: Final answer
   x = 10,618.44