Finding the Fourth Proportional to 22,488.81, 31,036.59 and 12,419.43

Step by Step Solution

1. Step 1: Write the proportion equation
   22,488.81 : 31,036.59 = 12,419.43 : x
2. Step 2: Convert to fraction form
   22,488.81/31,036.59 = 12,419.43/x
3. Step 3: Cross multiply
   22,488.81x = 31,036.59 × 12,419.43
4. Step 4: Simplify right side
   22,488.81x = 385,456,756.94
5. Step 5: Solve for x
   x = 385,456,756.94/22,488.81
6. Step 6: Final answer
   x = 17,139.94