Finding the Fourth Proportional to 12,700.89, 17,516.36 and 7,664.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,700.89 : 17,516.36 = 7,664.04 : x
2. Step 2: Convert to fraction form
   12,700.89/17,516.36 = 7,664.04/x
3. Step 3: Cross multiply
   12,700.89x = 17,516.36 × 7,664.04
4. Step 4: Simplify right side
   12,700.89x = 134,246,045.37
5. Step 5: Solve for x
   x = 134,246,045.37/12,700.89
6. Step 6: Final answer
   x = 10,569.81