Finding the Fourth Proportional to 2,109.55, 3,164.02 and 1,327.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.55 : 3,164.02 = 1,327.17 : x
2. Step 2: Convert to fraction form
   2,109.55/3,164.02 = 1,327.17/x
3. Step 3: Cross multiply
   2,109.55x = 3,164.02 × 1,327.17
4. Step 4: Simplify right side
   2,109.55x = 4,199,192.42
5. Step 5: Solve for x
   x = 4,199,192.42/2,109.55
6. Step 6: Final answer
   x = 1,990.56