Finding the Fourth Proportional to 21,062.62, 29,066.37 and 12,111.85

Step by Step Solution

1. Step 1: Write the proportion equation
   21,062.62 : 29,066.37 = 12,111.85 : x
2. Step 2: Convert to fraction form
   21,062.62/29,066.37 = 12,111.85/x
3. Step 3: Cross multiply
   21,062.62x = 29,066.37 × 12,111.85
4. Step 4: Simplify right side
   21,062.62x = 352,047,368.15
5. Step 5: Solve for x
   x = 352,047,368.15/21,062.62
6. Step 6: Final answer
   x = 16,714.32