Finding the Fourth Proportional to 16,870.11, 23,290.46 and 11,212.53

Step by Step Solution

1. Step 1: Write the proportion equation
   16,870.11 : 23,290.46 = 11,212.53 : x
2. Step 2: Convert to fraction form
   16,870.11/23,290.46 = 11,212.53/x
3. Step 3: Cross multiply
   16,870.11x = 23,290.46 × 11,212.53
4. Step 4: Simplify right side
   16,870.11x = 261,144,865.01
5. Step 5: Solve for x
   x = 261,144,865.01/16,870.11
6. Step 6: Final answer
   x = 15,479.74