Finding the Fourth Proportional to 5,145.68, 7,100.91 and 2,907.83

Step by Step Solution

1. Step 1: Write the proportion equation
   5,145.68 : 7,100.91 = 2,907.83 : x
2. Step 2: Convert to fraction form
   5,145.68/7,100.91 = 2,907.83/x
3. Step 3: Cross multiply
   5,145.68x = 7,100.91 × 2,907.83
4. Step 4: Simplify right side
   5,145.68x = 20,648,203.62
5. Step 5: Solve for x
   x = 20,648,203.62/5,145.68
6. Step 6: Final answer
   x = 4,012.73