Finding the Fourth Proportional to 2,799.30, 4,192.58 and 1,339.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,799.30 : 4,192.58 = 1,339.50 : x
2. Step 2: Convert to fraction form
   2,799.30/4,192.58 = 1,339.50/x
3. Step 3: Cross multiply
   2,799.30x = 4,192.58 × 1,339.50
4. Step 4: Simplify right side
   2,799.30x = 5,615,960.91
5. Step 5: Solve for x
   x = 5,615,960.91/2,799.30
6. Step 6: Final answer
   x = 2,006.20