Finding the Fourth Proportional to 3,187.78, 4,784.55 and 2,162.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,187.78 : 4,784.55 = 2,162.50 : x
2. Step 2: Convert to fraction form
   3,187.78/4,784.55 = 2,162.50/x
3. Step 3: Cross multiply
   3,187.78x = 4,784.55 × 2,162.50
4. Step 4: Simplify right side
   3,187.78x = 10,346,589.38
5. Step 5: Solve for x
   x = 10,346,589.38/3,187.78
6. Step 6: Final answer
   x = 3,245.70