Finding the Fourth Proportional to 22,477.64, 31,018.71 and 12,405.49

Step by Step Solution

1. Step 1: Write the proportion equation
   22,477.64 : 31,018.71 = 12,405.49 : x
2. Step 2: Convert to fraction form
   22,477.64/31,018.71 = 12,405.49/x
3. Step 3: Cross multiply
   22,477.64x = 31,018.71 × 12,405.49
4. Step 4: Simplify right side
   22,477.64x = 384,802,265.69
5. Step 5: Solve for x
   x = 384,802,265.69/22,477.64
6. Step 6: Final answer
   x = 17,119.34