Finding the Fourth Proportional to 12,388.38, 17,100.51 and 8,401.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,388.38 : 17,100.51 = 8,401.50 : x
2. Step 2: Convert to fraction form
   12,388.38/17,100.51 = 8,401.50/x
3. Step 3: Cross multiply
   12,388.38x = 17,100.51 × 8,401.50
4. Step 4: Simplify right side
   12,388.38x = 143,669,934.77
5. Step 5: Solve for x
   x = 143,669,934.77/12,388.38
6. Step 6: Final answer
   x = 11,597.15