Finding the Fourth Proportional to 22,476.87, 31,018.04 and 12,405.31

Step by Step Solution

1. Step 1: Write the proportion equation
   22,476.87 : 31,018.04 = 12,405.31 : x
2. Step 2: Convert to fraction form
   22,476.87/31,018.04 = 12,405.31/x
3. Step 3: Cross multiply
   22,476.87x = 31,018.04 × 12,405.31
4. Step 4: Simplify right side
   22,476.87x = 384,788,510.35
5. Step 5: Solve for x
   x = 384,788,510.35/22,476.87
6. Step 6: Final answer
   x = 17,119.31