Finding the Fourth Proportional to 21,033.98, 29,030.10 and 13,078.77

Step by Step Solution

1. Step 1: Write the proportion equation
   21,033.98 : 29,030.10 = 13,078.77 : x
2. Step 2: Convert to fraction form
   21,033.98/29,030.10 = 13,078.77/x
3. Step 3: Cross multiply
   21,033.98x = 29,030.10 × 13,078.77
4. Step 4: Simplify right side
   21,033.98x = 379,677,843.07
5. Step 5: Solve for x
   x = 379,677,843.07/21,033.98
6. Step 6: Final answer
   x = 18,050.69