Finding the Fourth Proportional to 21,030.18, 29,020.59 and 12,076.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,030.18 : 29,020.59 = 12,076.98 : x
2. Step 2: Convert to fraction form
   21,030.18/29,020.59 = 12,076.98/x
3. Step 3: Cross multiply
   21,030.18x = 29,020.59 × 12,076.98
4. Step 4: Simplify right side
   21,030.18x = 350,481,085.02
5. Step 5: Solve for x
   x = 350,481,085.02/21,030.18
6. Step 6: Final answer
   x = 16,665.62