Finding the Fourth Proportional to 2,718.09, 4,074.69 and 985.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,718.09 : 4,074.69 = 985.50 : x
2. Step 2: Convert to fraction form
   2,718.09/4,074.69 = 985.50/x
3. Step 3: Cross multiply
   2,718.09x = 4,074.69 × 985.50
4. Step 4: Simplify right side
   2,718.09x = 4,015,607.00
5. Step 5: Solve for x
   x = 4,015,607.00/2,718.09
6. Step 6: Final answer
   x = 1,477.36