Finding the Fourth Proportional to 3,468.05, 4,784.56 and 2,139.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,468.05 : 4,784.56 = 2,139.45 : x
2. Step 2: Convert to fraction form
   3,468.05/4,784.56 = 2,139.45/x
3. Step 3: Cross multiply
   3,468.05x = 4,784.56 × 2,139.45
4. Step 4: Simplify right side
   3,468.05x = 10,236,326.89
5. Step 5: Solve for x
   x = 10,236,326.89/3,468.05
6. Step 6: Final answer
   x = 2,951.61