Finding the Fourth Proportional to 1,945.89, 2,918.34 and 850.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,945.89 : 2,918.34 = 850.05 : x
2. Step 2: Convert to fraction form
   1,945.89/2,918.34 = 850.05/x
3. Step 3: Cross multiply
   1,945.89x = 2,918.34 × 850.05
4. Step 4: Simplify right side
   1,945.89x = 2,480,734.92
5. Step 5: Solve for x
   x = 2,480,734.92/1,945.89
6. Step 6: Final answer
   x = 1,274.86