Finding the Fourth Proportional to 5,145.39, 7,100.73 and 2,907.36

Step by Step Solution

1. Step 1: Write the proportion equation
   5,145.39 : 7,100.73 = 2,907.36 : x
2. Step 2: Convert to fraction form
   5,145.39/7,100.73 = 2,907.36/x
3. Step 3: Cross multiply
   5,145.39x = 7,100.73 × 2,907.36
4. Step 4: Simplify right side
   5,145.39x = 20,644,378.37
5. Step 5: Solve for x
   x = 20,644,378.37/5,145.39
6. Step 6: Final answer
   x = 4,012.21