Finding the Fourth Proportional to 12,429.90, 17,145.45 and 8,181.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.90 : 17,145.45 = 8,181.18 : x
2. Step 2: Convert to fraction form
   12,429.90/17,145.45 = 8,181.18/x
3. Step 3: Cross multiply
   12,429.90x = 17,145.45 × 8,181.18
4. Step 4: Simplify right side
   12,429.90x = 140,270,012.63
5. Step 5: Solve for x
   x = 140,270,012.63/12,429.90
6. Step 6: Final answer
   x = 11,284.89