Finding the Fourth Proportional to 5,145.22, 7,100.43 and 2,907.30

Step by Step Solution

1. Step 1: Write the proportion equation
   5,145.22 : 7,100.43 = 2,907.30 : x
2. Step 2: Convert to fraction form
   5,145.22/7,100.43 = 2,907.30/x
3. Step 3: Cross multiply
   5,145.22x = 7,100.43 × 2,907.30
4. Step 4: Simplify right side
   5,145.22x = 20,643,080.14
5. Step 5: Solve for x
   x = 20,643,080.14/5,145.22
6. Step 6: Final answer
   x = 4,012.09