Finding the Fourth Proportional to 12,672.89, 17,487.89 and 7,007.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,672.89 : 17,487.89 = 7,007.31 : x
2. Step 2: Convert to fraction form
   12,672.89/17,487.89 = 7,007.31/x
3. Step 3: Cross multiply
   12,672.89x = 17,487.89 × 7,007.31
4. Step 4: Simplify right side
   12,672.89x = 122,543,066.48
5. Step 5: Solve for x
   x = 122,543,066.48/12,672.89
6. Step 6: Final answer
   x = 9,669.70