Finding the Fourth Proportional to 12,967.56, 17,894.94 and 7,931.85

Step by Step Solution

1. Step 1: Write the proportion equation
   12,967.56 : 17,894.94 = 7,931.85 : x
2. Step 2: Convert to fraction form
   12,967.56/17,894.94 = 7,931.85/x
3. Step 3: Cross multiply
   12,967.56x = 17,894.94 × 7,931.85
4. Step 4: Simplify right side
   12,967.56x = 141,939,979.84
5. Step 5: Solve for x
   x = 141,939,979.84/12,967.56
6. Step 6: Final answer
   x = 10,945.77