Finding the Fourth Proportional to 12,958.89, 17,880.24 and 7,654.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,958.89 : 17,880.24 = 7,654.49 : x
2. Step 2: Convert to fraction form
   12,958.89/17,880.24 = 7,654.49/x
3. Step 3: Cross multiply
   12,958.89x = 17,880.24 × 7,654.49
4. Step 4: Simplify right side
   12,958.89x = 136,864,118.28
5. Step 5: Solve for x
   x = 136,864,118.28/12,958.89
6. Step 6: Final answer
   x = 10,561.41