Finding the Fourth Proportional to 12,487.91, 17,237.00 and 7,186.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,487.91 : 17,237.00 = 7,186.46 : x
2. Step 2: Convert to fraction form
   12,487.91/17,237.00 = 7,186.46/x
3. Step 3: Cross multiply
   12,487.91x = 17,237.00 × 7,186.46
4. Step 4: Simplify right side
   12,487.91x = 123,872,942.80
5. Step 5: Solve for x
   x = 123,872,942.80/12,487.91
6. Step 6: Final answer
   x = 9,919.43