Finding the Fourth Proportional to 2,390.52, 3,298.86 and 1,396.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,390.52 : 3,298.86 = 1,396.38 : x
2. Step 2: Convert to fraction form
   2,390.52/3,298.86 = 1,396.38/x
3. Step 3: Cross multiply
   2,390.52x = 3,298.86 × 1,396.38
4. Step 4: Simplify right side
   2,390.52x = 4,606,462.13
5. Step 5: Solve for x
   x = 4,606,462.13/2,390.52
6. Step 6: Final answer
   x = 1,926.97