Finding the Fourth Proportional to 20,969.01, 28,937.79 and 11,538.18

Step by Step Solution

1. Step 1: Write the proportion equation
   20,969.01 : 28,937.79 = 11,538.18 : x
2. Step 2: Convert to fraction form
   20,969.01/28,937.79 = 11,538.18/x
3. Step 3: Cross multiply
   20,969.01x = 28,937.79 × 11,538.18
4. Step 4: Simplify right side
   20,969.01x = 333,889,429.82
5. Step 5: Solve for x
   x = 333,889,429.82/20,969.01
6. Step 6: Final answer
   x = 15,922.99