Finding the Fourth Proportional to 5,145.27, 7,100.47 and 2,787.41

Step by Step Solution

1. Step 1: Write the proportion equation
   5,145.27 : 7,100.47 = 2,787.41 : x
2. Step 2: Convert to fraction form
   5,145.27/7,100.47 = 2,787.41/x
3. Step 3: Cross multiply
   5,145.27x = 7,100.47 × 2,787.41
4. Step 4: Simplify right side
   5,145.27x = 19,791,871.64
5. Step 5: Solve for x
   x = 19,791,871.64/5,145.27
6. Step 6: Final answer
   x = 3,846.62