Finding the Fourth Proportional to 12,898.85, 17,797.73 and 8,429.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,898.85 : 17,797.73 = 8,429.16 : x
2. Step 2: Convert to fraction form
   12,898.85/17,797.73 = 8,429.16/x
3. Step 3: Cross multiply
   12,898.85x = 17,797.73 × 8,429.16
4. Step 4: Simplify right side
   12,898.85x = 150,019,938.40
5. Step 5: Solve for x
   x = 150,019,938.40/12,898.85
6. Step 6: Final answer
   x = 11,630.49