Finding the Fourth Proportional to 2,942.96, 4,415.31 and 1,187.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,942.96 : 4,415.31 = 1,187.06 : x
2. Step 2: Convert to fraction form
   2,942.96/4,415.31 = 1,187.06/x
3. Step 3: Cross multiply
   2,942.96x = 4,415.31 × 1,187.06
4. Step 4: Simplify right side
   2,942.96x = 5,241,215.81
5. Step 5: Solve for x
   x = 5,241,215.81/2,942.96
6. Step 6: Final answer
   x = 1,780.94