Finding the Fourth Proportional to 21,085.38, 29,095.47 and 11,651.58

Step by Step Solution

1. Step 1: Write the proportion equation
   21,085.38 : 29,095.47 = 11,651.58 : x
2. Step 2: Convert to fraction form
   21,085.38/29,095.47 = 11,651.58/x
3. Step 3: Cross multiply
   21,085.38x = 29,095.47 × 11,651.58
4. Step 4: Simplify right side
   21,085.38x = 339,008,196.34
5. Step 5: Solve for x
   x = 339,008,196.34/21,085.38
6. Step 6: Final answer
   x = 16,077.88