Finding the Fourth Proportional to 12,487.86, 17,231.50 and 12,151.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,487.86 : 17,231.50 = 12,151.86 : x
2. Step 2: Convert to fraction form
   12,487.86/17,231.50 = 12,151.86/x
3. Step 3: Cross multiply
   12,487.86x = 17,231.50 × 12,151.86
4. Step 4: Simplify right side
   12,487.86x = 209,394,659.05
5. Step 5: Solve for x
   x = 209,394,659.05/12,487.86
6. Step 6: Final answer
   x = 16,767.86