Finding the Fourth Proportional to 12,701.16, 17,528.22 and 7,665.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,701.16 : 17,528.22 = 7,665.30 : x
2. Step 2: Convert to fraction form
   12,701.16/17,528.22 = 7,665.30/x
3. Step 3: Cross multiply
   12,701.16x = 17,528.22 × 7,665.30
4. Step 4: Simplify right side
   12,701.16x = 134,359,064.77
5. Step 5: Solve for x
   x = 134,359,064.77/12,701.16
6. Step 6: Final answer
   x = 10,578.49