Finding the Fourth Proportional to 23,064.87, 31,824.03 and 12,991.30

Step by Step Solution

1. Step 1: Write the proportion equation
   23,064.87 : 31,824.03 = 12,991.30 : x
2. Step 2: Convert to fraction form
   23,064.87/31,824.03 = 12,991.30/x
3. Step 3: Cross multiply
   23,064.87x = 31,824.03 × 12,991.30
4. Step 4: Simplify right side
   23,064.87x = 413,435,520.94
5. Step 5: Solve for x
   x = 413,435,520.94/23,064.87
6. Step 6: Final answer
   x = 17,924.90