Finding the Fourth Proportional to 3,520.33, 5,267.28 and 2,109.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,520.33 : 5,267.28 = 2,109.56 : x
2. Step 2: Convert to fraction form
   3,520.33/5,267.28 = 2,109.56/x
3. Step 3: Cross multiply
   3,520.33x = 5,267.28 × 2,109.56
4. Step 4: Simplify right side
   3,520.33x = 11,111,642.53
5. Step 5: Solve for x
   x = 11,111,642.53/3,520.33
6. Step 6: Final answer
   x = 3,156.42