Finding the Fourth Proportional to 3,510.15, 5,262.59 and 2,123.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,510.15 : 5,262.59 = 2,123.20 : x
2. Step 2: Convert to fraction form
   3,510.15/5,262.59 = 2,123.20/x
3. Step 3: Cross multiply
   3,510.15x = 5,262.59 × 2,123.20
4. Step 4: Simplify right side
   3,510.15x = 11,173,507.32
5. Step 5: Solve for x
   x = 11,173,507.32/3,510.15
6. Step 6: Final answer
   x = 3,183.20