Finding the Fourth Proportional to 2,908.55, 4,362.86 and 828.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,908.55 : 4,362.86 = 828.60 : x
2. Step 2: Convert to fraction form
   2,908.55/4,362.86 = 828.60/x
3. Step 3: Cross multiply
   2,908.55x = 4,362.86 × 828.60
4. Step 4: Simplify right side
   2,908.55x = 3,615,061.65
5. Step 5: Solve for x
   x = 3,615,061.65/2,908.55
6. Step 6: Final answer
   x = 1,242.91