Finding the Fourth Proportional to 4,784.79, 7,169.86 and 3,218.99

Step by Step Solution

1. Step 1: Write the proportion equation
   4,784.79 : 7,169.86 = 3,218.99 : x
2. Step 2: Convert to fraction form
   4,784.79/7,169.86 = 3,218.99/x
3. Step 3: Cross multiply
   4,784.79x = 7,169.86 × 3,218.99
4. Step 4: Simplify right side
   4,784.79x = 23,079,717.52
5. Step 5: Solve for x
   x = 23,079,717.52/4,784.79
6. Step 6: Final answer
   x = 4,823.56