Finding the Fourth Proportional to 11,910.76, 17,868.63 and 3,591.37

Step by Step Solution

1. Step 1: Write the proportion equation
   11,910.76 : 17,868.63 = 3,591.37 : x
2. Step 2: Convert to fraction form
   11,910.76/17,868.63 = 3,591.37/x
3. Step 3: Cross multiply
   11,910.76x = 17,868.63 × 3,591.37
4. Step 4: Simplify right side
   11,910.76x = 64,172,861.72
5. Step 5: Solve for x
   x = 64,172,861.72/11,910.76
6. Step 6: Final answer
   x = 5,387.81