Finding the Fourth Proportional to 12,339.34, 17,020.45 and 8,090.68

Step by Step Solution

1. Step 1: Write the proportion equation
   12,339.34 : 17,020.45 = 8,090.68 : x
2. Step 2: Convert to fraction form
   12,339.34/17,020.45 = 8,090.68/x
3. Step 3: Cross multiply
   12,339.34x = 17,020.45 × 8,090.68
4. Step 4: Simplify right side
   12,339.34x = 137,706,920.50
5. Step 5: Solve for x
   x = 137,706,920.50/12,339.34
6. Step 6: Final answer
   x = 11,159.99