Finding the Fourth Proportional to 5,145.47, 7,100.75 and 2,787.62

Step by Step Solution

1. Step 1: Write the proportion equation
   5,145.47 : 7,100.75 = 2,787.62 : x
2. Step 2: Convert to fraction form
   5,145.47/7,100.75 = 2,787.62/x
3. Step 3: Cross multiply
   5,145.47x = 7,100.75 × 2,787.62
4. Step 4: Simplify right side
   5,145.47x = 19,794,143.27
5. Step 5: Solve for x
   x = 19,794,143.27/5,145.47
6. Step 6: Final answer
   x = 3,846.91