Finding the Fourth Proportional to 4,986.27, 7,479.59 and 1,288.62

Step by Step Solution

1. Step 1: Write the proportion equation
   4,986.27 : 7,479.59 = 1,288.62 : x
2. Step 2: Convert to fraction form
   4,986.27/7,479.59 = 1,288.62/x
3. Step 3: Cross multiply
   4,986.27x = 7,479.59 × 1,288.62
4. Step 4: Simplify right side
   4,986.27x = 9,638,342.82
5. Step 5: Solve for x
   x = 9,638,342.82/4,986.27
6. Step 6: Final answer
   x = 1,932.98