Finding the Fourth Proportional to 3,917.95, 5,874.78 and 1,807.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,917.95 : 5,874.78 = 1,807.30 : x
2. Step 2: Convert to fraction form
   3,917.95/5,874.78 = 1,807.30/x
3. Step 3: Cross multiply
   3,917.95x = 5,874.78 × 1,807.30
4. Step 4: Simplify right side
   3,917.95x = 10,617,489.89
5. Step 5: Solve for x
   x = 10,617,489.89/3,917.95
6. Step 6: Final answer
   x = 2,709.96