Finding the Fourth Proportional to 12,389.59, 17,074.03 and 12,161.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,389.59 : 17,074.03 = 12,161.86 : x
2. Step 2: Convert to fraction form
   12,389.59/17,074.03 = 12,161.86/x
3. Step 3: Cross multiply
   12,389.59x = 17,074.03 × 12,161.86
4. Step 4: Simplify right side
   12,389.59x = 207,651,901.69
5. Step 5: Solve for x
   x = 207,651,901.69/12,389.59
6. Step 6: Final answer
   x = 16,760.19