Finding the Fourth Proportional to 12,961.24, 17,885.82 and 7,372.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,961.24 : 17,885.82 = 7,372.12 : x
2. Step 2: Convert to fraction form
   12,961.24/17,885.82 = 7,372.12/x
3. Step 3: Cross multiply
   12,961.24x = 17,885.82 × 7,372.12
4. Step 4: Simplify right side
   12,961.24x = 131,856,411.34
5. Step 5: Solve for x
   x = 131,856,411.34/12,961.24
6. Step 6: Final answer
   x = 10,173.13