Finding the Fourth Proportional to 2,908.86, 4,362.61 and 828.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,908.86 : 4,362.61 = 828.33 : x
2. Step 2: Convert to fraction form
   2,908.86/4,362.61 = 828.33/x
3. Step 3: Cross multiply
   2,908.86x = 4,362.61 × 828.33
4. Step 4: Simplify right side
   2,908.86x = 3,613,663.86
5. Step 5: Solve for x
   x = 3,613,663.86/2,908.86
6. Step 6: Final answer
   x = 1,242.29