Finding the Fourth Proportional to 21,077.82, 29,083.59 and 13,621.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,077.82 : 29,083.59 = 13,621.50 : x
2. Step 2: Convert to fraction form
   21,077.82/29,083.59 = 13,621.50/x
3. Step 3: Cross multiply
   21,077.82x = 29,083.59 × 13,621.50
4. Step 4: Simplify right side
   21,077.82x = 396,162,121.19
5. Step 5: Solve for x
   x = 396,162,121.19/21,077.82
6. Step 6: Final answer
   x = 18,795.21