Finding the Fourth Proportional to 2,804.72, 3,870.16 and 1,685.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,804.72 : 3,870.16 = 1,685.48 : x
2. Step 2: Convert to fraction form
   2,804.72/3,870.16 = 1,685.48/x
3. Step 3: Cross multiply
   2,804.72x = 3,870.16 × 1,685.48
4. Step 4: Simplify right side
   2,804.72x = 6,523,077.28
5. Step 5: Solve for x
   x = 6,523,077.28/2,804.72
6. Step 6: Final answer
   x = 2,325.75