Finding the Fourth Proportional to 22,519.81, 31,075.98 and 12,447.65

Step by Step Solution

1. Step 1: Write the proportion equation
   22,519.81 : 31,075.98 = 12,447.65 : x
2. Step 2: Convert to fraction form
   22,519.81/31,075.98 = 12,447.65/x
3. Step 3: Cross multiply
   22,519.81x = 31,075.98 × 12,447.65
4. Step 4: Simplify right side
   22,519.81x = 386,822,875.88
5. Step 5: Solve for x
   x = 386,822,875.88/22,519.81
6. Step 6: Final answer
   x = 17,177.01