Finding the Fourth Proportional to 21,843.10, 32,758.31 and 8,513.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,843.10 : 32,758.31 = 8,513.12 : x
2. Step 2: Convert to fraction form
   21,843.10/32,758.31 = 8,513.12/x
3. Step 3: Cross multiply
   21,843.10x = 32,758.31 × 8,513.12
4. Step 4: Simplify right side
   21,843.10x = 278,875,527.21
5. Step 5: Solve for x
   x = 278,875,527.21/21,843.10
6. Step 6: Final answer
   x = 12,767.21