Finding the Fourth Proportional to 12,876.82, 17,770.04 and 7,211.68

Step by Step Solution

1. Step 1: Write the proportion equation
   12,876.82 : 17,770.04 = 7,211.68 : x
2. Step 2: Convert to fraction form
   12,876.82/17,770.04 = 7,211.68/x
3. Step 3: Cross multiply
   12,876.82x = 17,770.04 × 7,211.68
4. Step 4: Simplify right side
   12,876.82x = 128,151,842.07
5. Step 5: Solve for x
   x = 128,151,842.07/12,876.82
6. Step 6: Final answer
   x = 9,952.13