Finding the Fourth Proportional to 7,089.21, 10,621.67 and 5,005.49

Step by Step Solution

1. Step 1: Write the proportion equation
   7,089.21 : 10,621.67 = 5,005.49 : x
2. Step 2: Convert to fraction form
   7,089.21/10,621.67 = 5,005.49/x
3. Step 3: Cross multiply
   7,089.21x = 10,621.67 × 5,005.49
4. Step 4: Simplify right side
   7,089.21x = 53,166,584.83
5. Step 5: Solve for x
   x = 53,166,584.83/7,089.21
6. Step 6: Final answer
   x = 7,499.65