Finding the Fourth Proportional to 1,947.18, 2,918.88 and 851.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,947.18 : 2,918.88 = 851.34 : x
2. Step 2: Convert to fraction form
   1,947.18/2,918.88 = 851.34/x
3. Step 3: Cross multiply
   1,947.18x = 2,918.88 × 851.34
4. Step 4: Simplify right side
   1,947.18x = 2,484,959.30
5. Step 5: Solve for x
   x = 2,484,959.30/1,947.18
6. Step 6: Final answer
   x = 1,276.18