Finding the Fourth Proportional to 2,820.02, 4,228.94 and 1,664.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,820.02 : 4,228.94 = 1,664.42 : x
2. Step 2: Convert to fraction form
   2,820.02/4,228.94 = 1,664.42/x
3. Step 3: Cross multiply
   2,820.02x = 4,228.94 × 1,664.42
4. Step 4: Simplify right side
   2,820.02x = 7,038,715.33
5. Step 5: Solve for x
   x = 7,038,715.33/2,820.02
6. Step 6: Final answer
   x = 2,495.99