Finding the Fourth Proportional to 5,145.29, 7,100.48 and 2,787.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,145.29 : 7,100.48 = 2,787.42 : x
2. Step 2: Convert to fraction form
   5,145.29/7,100.48 = 2,787.42/x
3. Step 3: Cross multiply
   5,145.29x = 7,100.48 × 2,787.42
4. Step 4: Simplify right side
   5,145.29x = 19,792,006.02
5. Step 5: Solve for x
   x = 19,792,006.02/5,145.29
6. Step 6: Final answer
   x = 3,846.63