Finding the Fourth Proportional to 8,980.34, 12,389.49 and 5,442.26

Step by Step Solution

1. Step 1: Write the proportion equation
   8,980.34 : 12,389.49 = 5,442.26 : x
2. Step 2: Convert to fraction form
   8,980.34/12,389.49 = 5,442.26/x
3. Step 3: Cross multiply
   8,980.34x = 12,389.49 × 5,442.26
4. Step 4: Simplify right side
   8,980.34x = 67,426,763.90
5. Step 5: Solve for x
   x = 67,426,763.90/8,980.34
6. Step 6: Final answer
   x = 7,508.27