Finding the Fourth Proportional to 12,689.95, 17,513.28 and 7,026.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,689.95 : 17,513.28 = 7,026.04 : x
2. Step 2: Convert to fraction form
   12,689.95/17,513.28 = 7,026.04/x
3. Step 3: Cross multiply
   12,689.95x = 17,513.28 × 7,026.04
4. Step 4: Simplify right side
   12,689.95x = 123,049,005.81
5. Step 5: Solve for x
   x = 123,049,005.81/12,689.95
6. Step 6: Final answer
   x = 9,696.57