Finding the Fourth Proportional to 11,809.85, 17,714.72 and 8,100.81

Step by Step Solution

1. Step 1: Write the proportion equation
   11,809.85 : 17,714.72 = 8,100.81 : x
2. Step 2: Convert to fraction form
   11,809.85/17,714.72 = 8,100.81/x
3. Step 3: Cross multiply
   11,809.85x = 17,714.72 × 8,100.81
4. Step 4: Simplify right side
   11,809.85x = 143,503,601.18
5. Step 5: Solve for x
   x = 143,503,601.18/11,809.85
6. Step 6: Final answer
   x = 12,151.18