Finding the Fourth Proportional to 2,511.30, 3,465.80 and 1,392.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,511.30 : 3,465.80 = 1,392.59 : x
2. Step 2: Convert to fraction form
   2,511.30/3,465.80 = 1,392.59/x
3. Step 3: Cross multiply
   2,511.30x = 3,465.80 × 1,392.59
4. Step 4: Simplify right side
   2,511.30x = 4,826,432.35
5. Step 5: Solve for x
   x = 4,826,432.35/2,511.30
6. Step 6: Final answer
   x = 1,921.89