Finding the Fourth Proportional to 12,972.88, 17,898.42 and 7,669.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,972.88 : 17,898.42 = 7,669.48 : x
2. Step 2: Convert to fraction form
   12,972.88/17,898.42 = 7,669.48/x
3. Step 3: Cross multiply
   12,972.88x = 17,898.42 × 7,669.48
4. Step 4: Simplify right side
   12,972.88x = 137,271,574.22
5. Step 5: Solve for x
   x = 137,271,574.22/12,972.88
6. Step 6: Final answer
   x = 10,581.43