Finding the Fourth Proportional to 12,965.57, 17,892.32 and 7,223.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,965.57 : 17,892.32 = 7,223.02 : x
2. Step 2: Convert to fraction form
   12,965.57/17,892.32 = 7,223.02/x
3. Step 3: Cross multiply
   12,965.57x = 17,892.32 × 7,223.02
4. Step 4: Simplify right side
   12,965.57x = 129,236,625.32
5. Step 5: Solve for x
   x = 129,236,625.32/12,965.57
6. Step 6: Final answer
   x = 9,967.68