Finding the Fourth Proportional to 1,947.59, 2,919.72 and 851.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,947.59 : 2,919.72 = 851.13 : x
2. Step 2: Convert to fraction form
   1,947.59/2,919.72 = 851.13/x
3. Step 3: Cross multiply
   1,947.59x = 2,919.72 × 851.13
4. Step 4: Simplify right side
   1,947.59x = 2,485,061.28
5. Step 5: Solve for x
   x = 2,485,061.28/1,947.59
6. Step 6: Final answer
   x = 1,275.97