Finding the Fourth Proportional to 2,791.21, 4,185.29 and 1,803.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,791.21 : 4,185.29 = 1,803.89 : x
2. Step 2: Convert to fraction form
   2,791.21/4,185.29 = 1,803.89/x
3. Step 3: Cross multiply
   2,791.21x = 4,185.29 × 1,803.89
4. Step 4: Simplify right side
   2,791.21x = 7,549,802.78
5. Step 5: Solve for x
   x = 7,549,802.78/2,791.21
6. Step 6: Final answer
   x = 2,704.85