Finding the Fourth Proportional to 1,802.17, 2,704.27 and 828.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,802.17 : 2,704.27 = 828.35 : x
2. Step 2: Convert to fraction form
   1,802.17/2,704.27 = 828.35/x
3. Step 3: Cross multiply
   1,802.17x = 2,704.27 × 828.35
4. Step 4: Simplify right side
   1,802.17x = 2,240,082.05
5. Step 5: Solve for x
   x = 2,240,082.05/1,802.17
6. Step 6: Final answer
   x = 1,242.99