Finding the Fourth Proportional to 12,817.36, 17,678.76 and 8,332.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,817.36 : 17,678.76 = 8,332.72 : x
2. Step 2: Convert to fraction form
   12,817.36/17,678.76 = 8,332.72/x
3. Step 3: Cross multiply
   12,817.36x = 17,678.76 × 8,332.72
4. Step 4: Simplify right side
   12,817.36x = 147,312,157.03
5. Step 5: Solve for x
   x = 147,312,157.03/12,817.36
6. Step 6: Final answer
   x = 11,493.17