Finding the Fourth Proportional to 2,809.62, 3,880.71 and 1,928.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,809.62 : 3,880.71 = 1,928.34 : x
2. Step 2: Convert to fraction form
   2,809.62/3,880.71 = 1,928.34/x
3. Step 3: Cross multiply
   2,809.62x = 3,880.71 × 1,928.34
4. Step 4: Simplify right side
   2,809.62x = 7,483,328.32
5. Step 5: Solve for x
   x = 7,483,328.32/2,809.62
6. Step 6: Final answer
   x = 2,663.47