Finding the Fourth Proportional to 21,109.16, 29,129.82 and 11,677.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,109.16 : 29,129.82 = 11,677.52 : x
2. Step 2: Convert to fraction form
   21,109.16/29,129.82 = 11,677.52/x
3. Step 3: Cross multiply
   21,109.16x = 29,129.82 × 11,677.52
4. Step 4: Simplify right side
   21,109.16x = 340,164,055.65
5. Step 5: Solve for x
   x = 340,164,055.65/21,109.16
6. Step 6: Final answer
   x = 16,114.52