Finding the Fourth Proportional to 4,761.33, 7,143.71 and 2,128.61

Step by Step Solution

1. Step 1: Write the proportion equation
   4,761.33 : 7,143.71 = 2,128.61 : x
2. Step 2: Convert to fraction form
   4,761.33/7,143.71 = 2,128.61/x
3. Step 3: Cross multiply
   4,761.33x = 7,143.71 × 2,128.61
4. Step 4: Simplify right side
   4,761.33x = 15,206,179.76
5. Step 5: Solve for x
   x = 15,206,179.76/4,761.33
6. Step 6: Final answer
   x = 3,193.68