Finding the Fourth Proportional to 2,015.58, 2,781.18 and 1,176.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.58 : 2,781.18 = 1,176.15 : x
2. Step 2: Convert to fraction form
   2,015.58/2,781.18 = 1,176.15/x
3. Step 3: Cross multiply
   2,015.58x = 2,781.18 × 1,176.15
4. Step 4: Simplify right side
   2,015.58x = 3,271,084.86
5. Step 5: Solve for x
   x = 3,271,084.86/2,015.58
6. Step 6: Final answer
   x = 1,622.90