Finding the Fourth Proportional to 2,752.51, 4,128.58 and 804.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,752.51 : 4,128.58 = 804.55 : x
2. Step 2: Convert to fraction form
   2,752.51/4,128.58 = 804.55/x
3. Step 3: Cross multiply
   2,752.51x = 4,128.58 × 804.55
4. Step 4: Simplify right side
   2,752.51x = 3,321,649.04
5. Step 5: Solve for x
   x = 3,321,649.04/2,752.51
6. Step 6: Final answer
   x = 1,206.77