Finding the Fourth Proportional to 2,557.01, 3,836.87 and 1,940.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.01 : 3,836.87 = 1,940.55 : x
2. Step 2: Convert to fraction form
   2,557.01/3,836.87 = 1,940.55/x
3. Step 3: Cross multiply
   2,557.01x = 3,836.87 × 1,940.55
4. Step 4: Simplify right side
   2,557.01x = 7,445,628.38
5. Step 5: Solve for x
   x = 7,445,628.38/2,557.01
6. Step 6: Final answer
   x = 2,911.86