Finding the Fourth Proportional to 8,980.34, 12,389.49 and 5,202.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,980.34 : 12,389.49 = 5,202.12 : x
2. Step 2: Convert to fraction form
   8,980.34/12,389.49 = 5,202.12/x
3. Step 3: Cross multiply
   8,980.34x = 12,389.49 × 5,202.12
4. Step 4: Simplify right side
   8,980.34x = 64,451,613.72
5. Step 5: Solve for x
   x = 64,451,613.72/8,980.34
6. Step 6: Final answer
   x = 7,176.97