Finding the Fourth Proportional to 12,717.98, 17,554.47 and 7,681.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,717.98 : 17,554.47 = 7,681.40 : x
2. Step 2: Convert to fraction form
   12,717.98/17,554.47 = 7,681.40/x
3. Step 3: Cross multiply
   12,717.98x = 17,554.47 × 7,681.40
4. Step 4: Simplify right side
   12,717.98x = 134,842,905.86
5. Step 5: Solve for x
   x = 134,842,905.86/12,717.98
6. Step 6: Final answer
   x = 10,602.54