Finding the Fourth Proportional to 8,964.61, 12,376.69 and 5,779.04

Step by Step Solution

1. Step 1: Write the proportion equation
   8,964.61 : 12,376.69 = 5,779.04 : x
2. Step 2: Convert to fraction form
   8,964.61/12,376.69 = 5,779.04/x
3. Step 3: Cross multiply
   8,964.61x = 12,376.69 × 5,779.04
4. Step 4: Simplify right side
   8,964.61x = 71,525,310.25
5. Step 5: Solve for x
   x = 71,525,310.25/8,964.61
6. Step 6: Final answer
   x = 7,978.63