Finding the Fourth Proportional to 8,764.49, 12,090.50 and 5,779.24

Step by Step Solution

1. Step 1: Write the proportion equation
   8,764.49 : 12,090.50 = 5,779.24 : x
2. Step 2: Convert to fraction form
   8,764.49/12,090.50 = 5,779.24/x
3. Step 3: Cross multiply
   8,764.49x = 12,090.50 × 5,779.24
4. Step 4: Simplify right side
   8,764.49x = 69,873,863.77
5. Step 5: Solve for x
   x = 69,873,863.77/8,764.49
6. Step 6: Final answer
   x = 7,972.38