Finding the Fourth Proportional to 12,817.82, 17,677.53 and 8,339.93

Step by Step Solution

1. Step 1: Write the proportion equation
   12,817.82 : 17,677.53 = 8,339.93 : x
2. Step 2: Convert to fraction form
   12,817.82/17,677.53 = 8,339.93/x
3. Step 3: Cross multiply
   12,817.82x = 17,677.53 × 8,339.93
4. Step 4: Simplify right side
   12,817.82x = 147,429,274.39
5. Step 5: Solve for x
   x = 147,429,274.39/12,817.82
6. Step 6: Final answer
   x = 11,501.90