Finding the Fourth Proportional to 12,638.10, 17,422.12 and 8,849.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,638.10 : 17,422.12 = 8,849.34 : x
2. Step 2: Convert to fraction form
   12,638.10/17,422.12 = 8,849.34/x
3. Step 3: Cross multiply
   12,638.10x = 17,422.12 × 8,849.34
4. Step 4: Simplify right side
   12,638.10x = 154,174,263.40
5. Step 5: Solve for x
   x = 154,174,263.40/12,638.10
6. Step 6: Final answer
   x = 12,199.16