Finding the Fourth Proportional to 12,081.83, 16,638.41 and 10,876.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,081.83 : 16,638.41 = 10,876.55 : x
2. Step 2: Convert to fraction form
   12,081.83/16,638.41 = 10,876.55/x
3. Step 3: Cross multiply
   12,081.83x = 16,638.41 × 10,876.55
4. Step 4: Simplify right side
   12,081.83x = 180,968,442.28
5. Step 5: Solve for x
   x = 180,968,442.28/12,081.83
6. Step 6: Final answer
   x = 14,978.57