Finding the Fourth Proportional to 22,472.58, 31,012.17 and 12,913.09

Step by Step Solution

1. Step 1: Write the proportion equation
   22,472.58 : 31,012.17 = 12,913.09 : x
2. Step 2: Convert to fraction form
   22,472.58/31,012.17 = 12,913.09/x
3. Step 3: Cross multiply
   22,472.58x = 31,012.17 × 12,913.09
4. Step 4: Simplify right side
   22,472.58x = 400,462,942.31
5. Step 5: Solve for x
   x = 400,462,942.31/22,472.58
6. Step 6: Final answer
   x = 17,820.07