Finding the Fourth Proportional to 2,607.29, 3,910.12 and 851.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.29 : 3,910.12 = 851.90 : x
2. Step 2: Convert to fraction form
   2,607.29/3,910.12 = 851.90/x
3. Step 3: Cross multiply
   2,607.29x = 3,910.12 × 851.90
4. Step 4: Simplify right side
   2,607.29x = 3,331,009.55
5. Step 5: Solve for x
   x = 3,331,009.55/2,607.29
6. Step 6: Final answer
   x = 1,277.58