Finding the Fourth Proportional to 12,381.42, 17,086.17 and 7,003.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,381.42 : 17,086.17 = 7,003.80 : x
2. Step 2: Convert to fraction form
   12,381.42/17,086.17 = 7,003.80/x
3. Step 3: Cross multiply
   12,381.42x = 17,086.17 × 7,003.80
4. Step 4: Simplify right side
   12,381.42x = 119,668,117.45
5. Step 5: Solve for x
   x = 119,668,117.45/12,381.42
6. Step 6: Final answer
   x = 9,665.14