Finding the Fourth Proportional to 2,801.99, 4,200.56 and 1,645.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,801.99 : 4,200.56 = 1,645.31 : x
2. Step 2: Convert to fraction form
   2,801.99/4,200.56 = 1,645.31/x
3. Step 3: Cross multiply
   2,801.99x = 4,200.56 × 1,645.31
4. Step 4: Simplify right side
   2,801.99x = 6,911,231.82
5. Step 5: Solve for x
   x = 6,911,231.82/2,801.99
6. Step 6: Final answer
   x = 2,466.54