Finding the Fourth Proportional to 8,784.74, 13,159.83 and 5,821.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,784.74 : 13,159.83 = 5,821.22 : x
2. Step 2: Convert to fraction form
   8,784.74/13,159.83 = 5,821.22/x
3. Step 3: Cross multiply
   8,784.74x = 13,159.83 × 5,821.22
4. Step 4: Simplify right side
   8,784.74x = 76,606,265.59
5. Step 5: Solve for x
   x = 76,606,265.59/8,784.74
6. Step 6: Final answer
   x = 8,720.38