Finding the Fourth Proportional to 7,172.50, 10,762.86 and 2,789.39

Step by Step Solution

1. Step 1: Write the proportion equation
   7,172.50 : 10,762.86 = 2,789.39 : x
2. Step 2: Convert to fraction form
   7,172.50/10,762.86 = 2,789.39/x
3. Step 3: Cross multiply
   7,172.50x = 10,762.86 × 2,789.39
4. Step 4: Simplify right side
   7,172.50x = 30,021,814.06
5. Step 5: Solve for x
   x = 30,021,814.06/7,172.50
6. Step 6: Final answer
   x = 4,185.68