Finding the Fourth Proportional to 4,978.90, 7,469.43 and 1,646.98

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.90 : 7,469.43 = 1,646.98 : x
2. Step 2: Convert to fraction form
   4,978.90/7,469.43 = 1,646.98/x
3. Step 3: Cross multiply
   4,978.90x = 7,469.43 × 1,646.98
4. Step 4: Simplify right side
   4,978.90x = 12,302,028.25
5. Step 5: Solve for x
   x = 12,302,028.25/4,978.90
6. Step 6: Final answer
   x = 2,470.83