Finding the Fourth Proportional to 11,969.78, 17,962.86 and 4,178.59

Step by Step Solution

1. Step 1: Write the proportion equation
   11,969.78 : 17,962.86 = 4,178.59 : x
2. Step 2: Convert to fraction form
   11,969.78/17,962.86 = 4,178.59/x
3. Step 3: Cross multiply
   11,969.78x = 17,962.86 × 4,178.59
4. Step 4: Simplify right side
   11,969.78x = 75,059,427.17
5. Step 5: Solve for x
   x = 75,059,427.17/11,969.78
6. Step 6: Final answer
   x = 6,270.74