Finding the Fourth Proportional to 5,145.03, 7,100.72 and 2,907.05

Step by Step Solution

1. Step 1: Write the proportion equation
   5,145.03 : 7,100.72 = 2,907.05 : x
2. Step 2: Convert to fraction form
   5,145.03/7,100.72 = 2,907.05/x
3. Step 3: Cross multiply
   5,145.03x = 7,100.72 × 2,907.05
4. Step 4: Simplify right side
   5,145.03x = 20,642,098.04
5. Step 5: Solve for x
   x = 20,642,098.04/5,145.03
6. Step 6: Final answer
   x = 4,012.05