Finding the Fourth Proportional to 22,449.84, 30,980.82 and 12,890.04

Step by Step Solution

1. Step 1: Write the proportion equation
   22,449.84 : 30,980.82 = 12,890.04 : x
2. Step 2: Convert to fraction form
   22,449.84/30,980.82 = 12,890.04/x
3. Step 3: Cross multiply
   22,449.84x = 30,980.82 × 12,890.04
4. Step 4: Simplify right side
   22,449.84x = 399,344,009.03
5. Step 5: Solve for x
   x = 399,344,009.03/22,449.84
6. Step 6: Final answer
   x = 17,788.28