Finding the Fourth Proportional to 2,290.07, 3,433.05 and 828.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.07 : 3,433.05 = 828.89 : x
2. Step 2: Convert to fraction form
   2,290.07/3,433.05 = 828.89/x
3. Step 3: Cross multiply
   2,290.07x = 3,433.05 × 828.89
4. Step 4: Simplify right side
   2,290.07x = 2,845,620.81
5. Step 5: Solve for x
   x = 2,845,620.81/2,290.07
6. Step 6: Final answer
   x = 1,242.59