Finding the Fourth Proportional to 12,967.72, 17,894.98 and 7,940.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,967.72 : 17,894.98 = 7,940.32 : x
2. Step 2: Convert to fraction form
   12,967.72/17,894.98 = 7,940.32/x
3. Step 3: Cross multiply
   12,967.72x = 17,894.98 × 7,940.32
4. Step 4: Simplify right side
   12,967.72x = 142,091,867.59
5. Step 5: Solve for x
   x = 142,091,867.59/12,967.72
6. Step 6: Final answer
   x = 10,957.35