Finding the Fourth Proportional to 3,411.95, 5,112.79 and 1,929.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,411.95 : 5,112.79 = 1,929.57 : x
2. Step 2: Convert to fraction form
   3,411.95/5,112.79 = 1,929.57/x
3. Step 3: Cross multiply
   3,411.95x = 5,112.79 × 1,929.57
4. Step 4: Simplify right side
   3,411.95x = 9,865,476.55
5. Step 5: Solve for x
   x = 9,865,476.55/3,411.95
6. Step 6: Final answer
   x = 2,891.45