Finding the Fourth Proportional to 1,947.83, 2,919.71 and 851.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,947.83 : 2,919.71 = 851.90 : x
2. Step 2: Convert to fraction form
   1,947.83/2,919.71 = 851.90/x
3. Step 3: Cross multiply
   1,947.83x = 2,919.71 × 851.90
4. Step 4: Simplify right side
   1,947.83x = 2,487,282.09
5. Step 5: Solve for x
   x = 2,487,282.09/1,947.83
6. Step 6: Final answer
   x = 1,276.95