Finding the Fourth Proportional to 28,013.94, 42,020.94 and 16,185.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,013.94 : 42,020.94 = 16,185.72 : x
2. Step 2: Convert to fraction form
   28,013.94/42,020.94 = 16,185.72/x
3. Step 3: Cross multiply
   28,013.94x = 42,020.94 × 16,185.72
4. Step 4: Simplify right side
   28,013.94x = 680,139,168.98
5. Step 5: Solve for x
   x = 680,139,168.98/28,013.94
6. Step 6: Final answer
   x = 24,278.60