Finding the Fourth Proportional to 11,346.06, 17,010.72 and 8,178.42

Step by Step Solution

1. Step 1: Write the proportion equation
   11,346.06 : 17,010.72 = 8,178.42 : x
2. Step 2: Convert to fraction form
   11,346.06/17,010.72 = 8,178.42/x
3. Step 3: Cross multiply
   11,346.06x = 17,010.72 × 8,178.42
4. Step 4: Simplify right side
   11,346.06x = 139,120,812.66
5. Step 5: Solve for x
   x = 139,120,812.66/11,346.06
6. Step 6: Final answer
   x = 12,261.60