Finding the Fourth Proportional to 2,106.50, 2,907.41 and 1,398.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.50 : 2,907.41 = 1,398.38 : x
2. Step 2: Convert to fraction form
   2,106.50/2,907.41 = 1,398.38/x
3. Step 3: Cross multiply
   2,106.50x = 2,907.41 × 1,398.38
4. Step 4: Simplify right side
   2,106.50x = 4,065,642.47
5. Step 5: Solve for x
   x = 4,065,642.47/2,106.50
6. Step 6: Final answer
   x = 1,930.05