Finding the Fourth Proportional to 21,079.98, 29,080.41 and 12,577.23

Step by Step Solution

1. Step 1: Write the proportion equation
   21,079.98 : 29,080.41 = 12,577.23 : x
2. Step 2: Convert to fraction form
   21,079.98/29,080.41 = 12,577.23/x
3. Step 3: Cross multiply
   21,079.98x = 29,080.41 × 12,577.23
4. Step 4: Simplify right side
   21,079.98x = 365,751,005.06
5. Step 5: Solve for x
   x = 365,751,005.06/21,079.98
6. Step 6: Final answer
   x = 17,350.63