Finding the Fourth Proportional to 7,631.86, 11,447.71 and 2,085.20

Step by Step Solution

1. Step 1: Write the proportion equation
   7,631.86 : 11,447.71 = 2,085.20 : x
2. Step 2: Convert to fraction form
   7,631.86/11,447.71 = 2,085.20/x
3. Step 3: Cross multiply
   7,631.86x = 11,447.71 × 2,085.20
4. Step 4: Simplify right side
   7,631.86x = 23,870,764.89
5. Step 5: Solve for x
   x = 23,870,764.89/7,631.86
6. Step 6: Final answer
   x = 3,127.78