Finding the Fourth Proportional to 5,145.83, 7,100.76 and 2,907.87

Step by Step Solution

1. Step 1: Write the proportion equation
   5,145.83 : 7,100.76 = 2,907.87 : x
2. Step 2: Convert to fraction form
   5,145.83/7,100.76 = 2,907.87/x
3. Step 3: Cross multiply
   5,145.83x = 7,100.76 × 2,907.87
4. Step 4: Simplify right side
   5,145.83x = 20,648,131.17
5. Step 5: Solve for x
   x = 20,648,131.17/5,145.83
6. Step 6: Final answer
   x = 4,012.60