Finding the Fourth Proportional to 2,051.55, 2,831.15 and 1,167.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,051.55 : 2,831.15 = 1,167.40 : x
2. Step 2: Convert to fraction form
   2,051.55/2,831.15 = 1,167.40/x
3. Step 3: Cross multiply
   2,051.55x = 2,831.15 × 1,167.40
4. Step 4: Simplify right side
   2,051.55x = 3,305,084.51
5. Step 5: Solve for x
   x = 3,305,084.51/2,051.55
6. Step 6: Final answer
   x = 1,611.02