Finding the Fourth Proportional to 22,491.09, 31,036.32 and 12,419.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,491.09 : 31,036.32 = 12,419.28 : x
2. Step 2: Convert to fraction form
   22,491.09/31,036.32 = 12,419.28/x
3. Step 3: Cross multiply
   22,491.09x = 31,036.32 × 12,419.28
4. Step 4: Simplify right side
   22,491.09x = 385,448,748.25
5. Step 5: Solve for x
   x = 385,448,748.25/22,491.09
6. Step 6: Final answer
   x = 17,137.84