Finding the Fourth Proportional to 8,798.78, 12,136.73 and 5,774.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,798.78 : 12,136.73 = 5,774.10 : x
2. Step 2: Convert to fraction form
   8,798.78/12,136.73 = 5,774.10/x
3. Step 3: Cross multiply
   8,798.78x = 12,136.73 × 5,774.10
4. Step 4: Simplify right side
   8,798.78x = 70,078,641.07
5. Step 5: Solve for x
   x = 70,078,641.07/8,798.78
6. Step 6: Final answer
   x = 7,964.58