Finding the Fourth Proportional to 2,839.46, 4,259.41 and 990.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,839.46 : 4,259.41 = 990.53 : x
2. Step 2: Convert to fraction form
   2,839.46/4,259.41 = 990.53/x
3. Step 3: Cross multiply
   2,839.46x = 4,259.41 × 990.53
4. Step 4: Simplify right side
   2,839.46x = 4,219,068.37
5. Step 5: Solve for x
   x = 4,219,068.37/2,839.46
6. Step 6: Final answer
   x = 1,485.87