Finding the Fourth Proportional to 12,715.98, 17,548.68 and 7,680.11

Step by Step Solution

1. Step 1: Write the proportion equation
   12,715.98 : 17,548.68 = 7,680.11 : x
2. Step 2: Convert to fraction form
   12,715.98/17,548.68 = 7,680.11/x
3. Step 3: Cross multiply
   12,715.98x = 17,548.68 × 7,680.11
4. Step 4: Simplify right side
   12,715.98x = 134,775,705.01
5. Step 5: Solve for x
   x = 134,775,705.01/12,715.98
6. Step 6: Final answer
   x = 10,598.92