Finding the Fourth Proportional to 2,799.30, 4,198.29 and 1,238.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,799.30 : 4,198.29 = 1,238.45 : x
2. Step 2: Convert to fraction form
   2,799.30/4,198.29 = 1,238.45/x
3. Step 3: Cross multiply
   2,799.30x = 4,198.29 × 1,238.45
4. Step 4: Simplify right side
   2,799.30x = 5,199,372.25
5. Step 5: Solve for x
   x = 5,199,372.25/2,799.30
6. Step 6: Final answer
   x = 1,857.38