Finding the Fourth Proportional to 13,124.25, 18,111.47 and 8,411.27

Step by Step Solution

1. Step 1: Write the proportion equation
   13,124.25 : 18,111.47 = 8,411.27 : x
2. Step 2: Convert to fraction form
   13,124.25/18,111.47 = 8,411.27/x
3. Step 3: Cross multiply
   13,124.25x = 18,111.47 × 8,411.27
4. Step 4: Simplify right side
   13,124.25x = 152,340,331.65
5. Step 5: Solve for x
   x = 152,340,331.65/13,124.25
6. Step 6: Final answer
   x = 11,607.55