Finding the Fourth Proportional to 12,911.38, 17,817.05 and 7,245.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,911.38 : 17,817.05 = 7,245.42 : x
2. Step 2: Convert to fraction form
   12,911.38/17,817.05 = 7,245.42/x
3. Step 3: Cross multiply
   12,911.38x = 17,817.05 × 7,245.42
4. Step 4: Simplify right side
   12,911.38x = 129,092,010.41
5. Step 5: Solve for x
   x = 129,092,010.41/12,911.38
6. Step 6: Final answer
   x = 9,998.31