Finding the Fourth Proportional to 22,483.42, 31,023.24 and 12,921.07

Step by Step Solution

1. Step 1: Write the proportion equation
   22,483.42 : 31,023.24 = 12,921.07 : x
2. Step 2: Convert to fraction form
   22,483.42/31,023.24 = 12,921.07/x
3. Step 3: Cross multiply
   22,483.42x = 31,023.24 × 12,921.07
4. Step 4: Simplify right side
   22,483.42x = 400,853,387.82
5. Step 5: Solve for x
   x = 400,853,387.82/22,483.42
6. Step 6: Final answer
   x = 17,828.84