Finding the Fourth Proportional to 21,030.72, 29,019.11 and 12,076.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,030.72 : 29,019.11 = 12,076.98 : x
2. Step 2: Convert to fraction form
   21,030.72/29,019.11 = 12,076.98/x
3. Step 3: Cross multiply
   21,030.72x = 29,019.11 × 12,076.98
4. Step 4: Simplify right side
   21,030.72x = 350,463,150.70
5. Step 5: Solve for x
   x = 350,463,150.70/21,030.72
6. Step 6: Final answer
   x = 16,664.34