Finding the Fourth Proportional to 3,468.31, 4,784.89 and 2,139.70

Step by Step Solution

1. Step 1: Write the proportion equation
   3,468.31 : 4,784.89 = 2,139.70 : x
2. Step 2: Convert to fraction form
   3,468.31/4,784.89 = 2,139.70/x
3. Step 3: Cross multiply
   3,468.31x = 4,784.89 × 2,139.70
4. Step 4: Simplify right side
   3,468.31x = 10,238,229.13
5. Step 5: Solve for x
   x = 10,238,229.13/3,468.31
6. Step 6: Final answer
   x = 2,951.94