Finding the Fourth Proportional to 21,613.89, 29,826.58 and 12,054.07

Step by Step Solution

1. Step 1: Write the proportion equation
   21,613.89 : 29,826.58 = 12,054.07 : x
2. Step 2: Convert to fraction form
   21,613.89/29,826.58 = 12,054.07/x
3. Step 3: Cross multiply
   21,613.89x = 29,826.58 × 12,054.07
4. Step 4: Simplify right side
   21,613.89x = 359,531,690.33
5. Step 5: Solve for x
   x = 359,531,690.33/21,613.89
6. Step 6: Final answer
   x = 16,634.29