Finding the Fourth Proportional to 21,450.96, 29,602.31 and 12,019.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,450.96 : 29,602.31 = 12,019.59 : x
2. Step 2: Convert to fraction form
   21,450.96/29,602.31 = 12,019.59/x
3. Step 3: Cross multiply
   21,450.96x = 29,602.31 × 12,019.59
4. Step 4: Simplify right side
   21,450.96x = 355,807,569.15
5. Step 5: Solve for x
   x = 355,807,569.15/21,450.96
6. Step 6: Final answer
   x = 16,587.02