Finding the Fourth Proportional to 23,182.05, 31,991.76 and 13,628.91

Step by Step Solution

1. Step 1: Write the proportion equation
   23,182.05 : 31,991.76 = 13,628.91 : x
2. Step 2: Convert to fraction form
   23,182.05/31,991.76 = 13,628.91/x
3. Step 3: Cross multiply
   23,182.05x = 31,991.76 × 13,628.91
4. Step 4: Simplify right side
   23,182.05x = 436,012,817.78
5. Step 5: Solve for x
   x = 436,012,817.78/23,182.05
6. Step 6: Final answer
   x = 18,808.21