Finding the Fourth Proportional to 12,785.84, 17,644.08 and 7,196.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,785.84 : 17,644.08 = 7,196.72 : x
2. Step 2: Convert to fraction form
   12,785.84/17,644.08 = 7,196.72/x
3. Step 3: Cross multiply
   12,785.84x = 17,644.08 × 7,196.72
4. Step 4: Simplify right side
   12,785.84x = 126,979,503.42
5. Step 5: Solve for x
   x = 126,979,503.42/12,785.84
6. Step 6: Final answer
   x = 9,931.26