Finding the Fourth Proportional to 4,986.72, 7,470.50 and 2,788.79

Step by Step Solution

1. Step 1: Write the proportion equation
   4,986.72 : 7,470.50 = 2,788.79 : x
2. Step 2: Convert to fraction form
   4,986.72/7,470.50 = 2,788.79/x
3. Step 3: Cross multiply
   4,986.72x = 7,470.50 × 2,788.79
4. Step 4: Simplify right side
   4,986.72x = 20,833,604.40
5. Step 5: Solve for x
   x = 20,833,604.40/4,986.72
6. Step 6: Final answer
   x = 4,177.82