Finding the Fourth Proportional to 10,198.72, 14,072.80 and 5,722.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,198.72 : 14,072.80 = 5,722.16 : x
2. Step 2: Convert to fraction form
   10,198.72/14,072.80 = 5,722.16/x
3. Step 3: Cross multiply
   10,198.72x = 14,072.80 × 5,722.16
4. Step 4: Simplify right side
   10,198.72x = 80,526,813.25
5. Step 5: Solve for x
   x = 80,526,813.25/10,198.72
6. Step 6: Final answer
   x = 7,895.78