Finding the Fourth Proportional to 13,161.31, 18,156.77 and 7,853.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,161.31 : 18,156.77 = 7,853.04 : x
2. Step 2: Convert to fraction form
   13,161.31/18,156.77 = 7,853.04/x
3. Step 3: Cross multiply
   13,161.31x = 18,156.77 × 7,853.04
4. Step 4: Simplify right side
   13,161.31x = 142,585,801.82
5. Step 5: Solve for x
   x = 142,585,801.82/13,161.31
6. Step 6: Final answer
   x = 10,833.71