Finding the Fourth Proportional to 4,761.25, 7,143.56 and 2,128.51

Step by Step Solution

1. Step 1: Write the proportion equation
   4,761.25 : 7,143.56 = 2,128.51 : x
2. Step 2: Convert to fraction form
   4,761.25/7,143.56 = 2,128.51/x
3. Step 3: Cross multiply
   4,761.25x = 7,143.56 × 2,128.51
4. Step 4: Simplify right side
   4,761.25x = 15,205,128.25
5. Step 5: Solve for x
   x = 15,205,128.25/4,761.25
6. Step 6: Final answer
   x = 3,193.52