Finding the Fourth Proportional to 3,784.83, 5,676.89 and 1,187.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,784.83 : 5,676.89 = 1,187.31 : x
2. Step 2: Convert to fraction form
   3,784.83/5,676.89 = 1,187.31/x
3. Step 3: Cross multiply
   3,784.83x = 5,676.89 × 1,187.31
4. Step 4: Simplify right side
   3,784.83x = 6,740,222.33
5. Step 5: Solve for x
   x = 6,740,222.33/3,784.83
6. Step 6: Final answer
   x = 1,780.85