Finding the Fourth Proportional to 22,819.81, 31,491.34 and 12,883.81

Step by Step Solution

1. Step 1: Write the proportion equation
   22,819.81 : 31,491.34 = 12,883.81 : x
2. Step 2: Convert to fraction form
   22,819.81/31,491.34 = 12,883.81/x
3. Step 3: Cross multiply
   22,819.81x = 31,491.34 × 12,883.81
4. Step 4: Simplify right side
   22,819.81x = 405,728,441.21
5. Step 5: Solve for x
   x = 405,728,441.21/22,819.81
6. Step 6: Final answer
   x = 17,779.66