Finding the Fourth Proportional to 11,678.40, 17,518.72 and 3,887.76

Step by Step Solution

1. Step 1: Write the proportion equation
   11,678.40 : 17,518.72 = 3,887.76 : x
2. Step 2: Convert to fraction form
   11,678.40/17,518.72 = 3,887.76/x
3. Step 3: Cross multiply
   11,678.40x = 17,518.72 × 3,887.76
4. Step 4: Simplify right side
   11,678.40x = 68,108,578.87
5. Step 5: Solve for x
   x = 68,108,578.87/11,678.40
6. Step 6: Final answer
   x = 5,832.01