Finding the Fourth Proportional to 4,978.57, 7,463.21 and 1,689.36

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.57 : 7,463.21 = 1,689.36 : x
2. Step 2: Convert to fraction form
   4,978.57/7,463.21 = 1,689.36/x
3. Step 3: Cross multiply
   4,978.57x = 7,463.21 × 1,689.36
4. Step 4: Simplify right side
   4,978.57x = 12,608,048.45
5. Step 5: Solve for x
   x = 12,608,048.45/4,978.57
6. Step 6: Final answer
   x = 2,532.46