Finding the Fourth Proportional to 21,091, 29,106.06 and 13,651.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,091 : 29,106.06 = 13,651.96 : x
2. Step 2: Convert to fraction form
   21,091/29,106.06 = 13,651.96/x
3. Step 3: Cross multiply
   21,091x = 29,106.06 × 13,651.96
4. Step 4: Simplify right side
   21,091x = 397,354,766.88
5. Step 5: Solve for x
   x = 397,354,766.88/21,091
6. Step 6: Final answer
   x = 18,840.02