Finding the Fourth Proportional to 4,986.84, 7,470.42 and 2,788.86

Step by Step Solution

1. Step 1: Write the proportion equation
   4,986.84 : 7,470.42 = 2,788.86 : x
2. Step 2: Convert to fraction form
   4,986.84/7,470.42 = 2,788.86/x
3. Step 3: Cross multiply
   4,986.84x = 7,470.42 × 2,788.86
4. Step 4: Simplify right side
   4,986.84x = 20,833,955.52
5. Step 5: Solve for x
   x = 20,833,955.52/4,986.84
6. Step 6: Final answer
   x = 4,177.79