Finding the Fourth Proportional to 2,106.86, 2,907.38 and 1,321.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.86 : 2,907.38 = 1,321.34 : x
2. Step 2: Convert to fraction form
   2,106.86/2,907.38 = 1,321.34/x
3. Step 3: Cross multiply
   2,106.86x = 2,907.38 × 1,321.34
4. Step 4: Simplify right side
   2,106.86x = 3,841,637.49
5. Step 5: Solve for x
   x = 3,841,637.49/2,106.86
6. Step 6: Final answer
   x = 1,823.39