Finding the Fourth Proportional to 3,940.92, 5,904.72 and 2,781

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940.92 : 5,904.72 = 2,781 : x
2. Step 2: Convert to fraction form
   3,940.92/5,904.72 = 2,781/x
3. Step 3: Cross multiply
   3,940.92x = 5,904.72 × 2,781
4. Step 4: Simplify right side
   3,940.92x = 16,421,026.32
5. Step 5: Solve for x
   x = 16,421,026.32/3,940.92
6. Step 6: Final answer
   x = 4,166.80