Finding the Fourth Proportional to 12,960.86, 17,886.39 and 7,372.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,960.86 : 17,886.39 = 7,372.22 : x
2. Step 2: Convert to fraction form
   12,960.86/17,886.39 = 7,372.22/x
3. Step 3: Cross multiply
   12,960.86x = 17,886.39 × 7,372.22
4. Step 4: Simplify right side
   12,960.86x = 131,862,402.09
5. Step 5: Solve for x
   x = 131,862,402.09/12,960.86
6. Step 6: Final answer
   x = 10,173.89