Finding the Fourth Proportional to 11,879.63, 17,818.40 and 3,561.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,879.63 : 17,818.40 = 3,561.50 : x
2. Step 2: Convert to fraction form
   11,879.63/17,818.40 = 3,561.50/x
3. Step 3: Cross multiply
   11,879.63x = 17,818.40 × 3,561.50
4. Step 4: Simplify right side
   11,879.63x = 63,460,265.02
5. Step 5: Solve for x
   x = 63,460,265.02/11,879.63
6. Step 6: Final answer
   x = 5,341.94