Finding the Fourth Proportional to 2,817.38, 3,884.45 and 1,807.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,817.38 : 3,884.45 = 1,807.31 : x
2. Step 2: Convert to fraction form
   2,817.38/3,884.45 = 1,807.31/x
3. Step 3: Cross multiply
   2,817.38x = 3,884.45 × 1,807.31
4. Step 4: Simplify right side
   2,817.38x = 7,020,385.91
5. Step 5: Solve for x
   x = 7,020,385.91/2,817.38
6. Step 6: Final answer
   x = 2,491.81