Finding the Fourth Proportional to 4,761.34, 7,140.33 and 1,428.59

Step by Step Solution

1. Step 1: Write the proportion equation
   4,761.34 : 7,140.33 = 1,428.59 : x
2. Step 2: Convert to fraction form
   4,761.34/7,140.33 = 1,428.59/x
3. Step 3: Cross multiply
   4,761.34x = 7,140.33 × 1,428.59
4. Step 4: Simplify right side
   4,761.34x = 10,200,604.03
5. Step 5: Solve for x
   x = 10,200,604.03/4,761.34
6. Step 6: Final answer
   x = 2,142.38