Finding the Fourth Proportional to 2,109.90, 3,164.87 and 1,384.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.90 : 3,164.87 = 1,384.08 : x
2. Step 2: Convert to fraction form
   2,109.90/3,164.87 = 1,384.08/x
3. Step 3: Cross multiply
   2,109.90x = 3,164.87 × 1,384.08
4. Step 4: Simplify right side
   2,109.90x = 4,380,433.27
5. Step 5: Solve for x
   x = 4,380,433.27/2,109.90
6. Step 6: Final answer
   x = 2,076.13