Finding the Fourth Proportional to 3,439.72, 4,746.71 and 1,947.77

Step by Step Solution

1. Step 1: Write the proportion equation
   3,439.72 : 4,746.71 = 1,947.77 : x
2. Step 2: Convert to fraction form
   3,439.72/4,746.71 = 1,947.77/x
3. Step 3: Cross multiply
   3,439.72x = 4,746.71 × 1,947.77
4. Step 4: Simplify right side
   3,439.72x = 9,245,499.34
5. Step 5: Solve for x
   x = 9,245,499.34/3,439.72
6. Step 6: Final answer
   x = 2,687.86