Finding the Fourth Proportional to 2,132.15, 2,942.15 and 1,187.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,132.15 : 2,942.15 = 1,187.96 : x
2. Step 2: Convert to fraction form
   2,132.15/2,942.15 = 1,187.96/x
3. Step 3: Cross multiply
   2,132.15x = 2,942.15 × 1,187.96
4. Step 4: Simplify right side
   2,132.15x = 3,495,135.86
5. Step 5: Solve for x
   x = 3,495,135.86/2,132.15
6. Step 6: Final answer
   x = 1,639.26