Finding the Fourth Proportional to 21,410.54, 29,574.78 and 16,436.23

Step by Step Solution

1. Step 1: Write the proportion equation
   21,410.54 : 29,574.78 = 16,436.23 : x
2. Step 2: Convert to fraction form
   21,410.54/29,574.78 = 16,436.23/x
3. Step 3: Cross multiply
   21,410.54x = 29,574.78 × 16,436.23
4. Step 4: Simplify right side
   21,410.54x = 486,097,886.28
5. Step 5: Solve for x
   x = 486,097,886.28/21,410.54
6. Step 6: Final answer
   x = 22,703.67