Finding the Fourth Proportional to 20,085.10, 27,714.06 and 13,380.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,085.10 : 27,714.06 = 13,380.72 : x
2. Step 2: Convert to fraction form
   20,085.10/27,714.06 = 13,380.72/x
3. Step 3: Cross multiply
   20,085.10x = 27,714.06 × 13,380.72
4. Step 4: Simplify right side
   20,085.10x = 370,834,076.92
5. Step 5: Solve for x
   x = 370,834,076.92/20,085.10
6. Step 6: Final answer
   x = 18,463.14