Finding the Fourth Proportional to 1,947.42, 2,920.50 and 851.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,947.42 : 2,920.50 = 851.49 : x
2. Step 2: Convert to fraction form
   1,947.42/2,920.50 = 851.49/x
3. Step 3: Cross multiply
   1,947.42x = 2,920.50 × 851.49
4. Step 4: Simplify right side
   1,947.42x = 2,486,776.55
5. Step 5: Solve for x
   x = 2,486,776.55/1,947.42
6. Step 6: Final answer
   x = 1,276.96