Finding the Fourth Proportional to 12,960.34, 17,881.09 and 7,656.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,960.34 : 17,881.09 = 7,656.98 : x
2. Step 2: Convert to fraction form
   12,960.34/17,881.09 = 7,656.98/x
3. Step 3: Cross multiply
   12,960.34x = 17,881.09 × 7,656.98
4. Step 4: Simplify right side
   12,960.34x = 136,915,148.51
5. Step 5: Solve for x
   x = 136,915,148.51/12,960.34
6. Step 6: Final answer
   x = 10,564.16