Finding the Fourth Proportional to 2,628.86, 3,943.96 and 985.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,628.86 : 3,943.96 = 985.52 : x
2. Step 2: Convert to fraction form
   2,628.86/3,943.96 = 985.52/x
3. Step 3: Cross multiply
   2,628.86x = 3,943.96 × 985.52
4. Step 4: Simplify right side
   2,628.86x = 3,886,858.86
5. Step 5: Solve for x
   x = 3,886,858.86/2,628.86
6. Step 6: Final answer
   x = 1,478.54