Finding the Fourth Proportional to 2,799.94, 4,200.45 and 851.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,799.94 : 4,200.45 = 851.98 : x
2. Step 2: Convert to fraction form
   2,799.94/4,200.45 = 851.98/x
3. Step 3: Cross multiply
   2,799.94x = 4,200.45 × 851.98
4. Step 4: Simplify right side
   2,799.94x = 3,578,699.39
5. Step 5: Solve for x
   x = 3,578,699.39/2,799.94
6. Step 6: Final answer
   x = 1,278.13