Finding the Fourth Proportional to 11,845.98, 17,770.79 and 3,945.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,845.98 : 17,770.79 = 3,945.78 : x
2. Step 2: Convert to fraction form
   11,845.98/17,770.79 = 3,945.78/x
3. Step 3: Cross multiply
   11,845.98x = 17,770.79 × 3,945.78
4. Step 4: Simplify right side
   11,845.98x = 70,119,627.77
5. Step 5: Solve for x
   x = 70,119,627.77/11,845.98
6. Step 6: Final answer
   x = 5,919.28