Finding the Fourth Proportional to 12,985.33, 19,486.22 and 7,449.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,985.33 : 19,486.22 = 7,449.49 : x
2. Step 2: Convert to fraction form
   12,985.33/19,486.22 = 7,449.49/x
3. Step 3: Cross multiply
   12,985.33x = 19,486.22 × 7,449.49
4. Step 4: Simplify right side
   12,985.33x = 145,162,401.03
5. Step 5: Solve for x
   x = 145,162,401.03/12,985.33
6. Step 6: Final answer
   x = 11,178.95