Finding the Fourth Proportional to 2,557.46, 3,838.10 and 1,900.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.46 : 3,838.10 = 1,900.87 : x
2. Step 2: Convert to fraction form
   2,557.46/3,838.10 = 1,900.87/x
3. Step 3: Cross multiply
   2,557.46x = 3,838.10 × 1,900.87
4. Step 4: Simplify right side
   2,557.46x = 7,295,710.05
5. Step 5: Solve for x
   x = 7,295,710.05/2,557.46
6. Step 6: Final answer
   x = 2,852.71