Finding the Fourth Proportional to 8,499.84, 12,757.87 and 5,219.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,499.84 : 12,757.87 = 5,219.34 : x
2. Step 2: Convert to fraction form
   8,499.84/12,757.87 = 5,219.34/x
3. Step 3: Cross multiply
   8,499.84x = 12,757.87 × 5,219.34
4. Step 4: Simplify right side
   8,499.84x = 66,587,661.21
5. Step 5: Solve for x
   x = 66,587,661.21/8,499.84
6. Step 6: Final answer
   x = 7,833.99