Finding the Fourth Proportional to 8,991.86, 12,404.58 and 5,804.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,991.86 : 12,404.58 = 5,804.34 : x
2. Step 2: Convert to fraction form
   8,991.86/12,404.58 = 5,804.34/x
3. Step 3: Cross multiply
   8,991.86x = 12,404.58 × 5,804.34
4. Step 4: Simplify right side
   8,991.86x = 72,000,399.88
5. Step 5: Solve for x
   x = 72,000,399.88/8,991.86
6. Step 6: Final answer
   x = 8,007.29