Finding the Fourth Proportional to 3,809.33, 5,256.83 and 2,130.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,809.33 : 5,256.83 = 2,130.72 : x
2. Step 2: Convert to fraction form
   3,809.33/5,256.83 = 2,130.72/x
3. Step 3: Cross multiply
   3,809.33x = 5,256.83 × 2,130.72
4. Step 4: Simplify right side
   3,809.33x = 11,200,822.16
5. Step 5: Solve for x
   x = 11,200,822.16/3,809.33
6. Step 6: Final answer
   x = 2,940.37