Finding the Fourth Proportional to 3,907.50, 5,392.53 and 2,139.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,907.50 : 5,392.53 = 2,139.18 : x
2. Step 2: Convert to fraction form
   3,907.50/5,392.53 = 2,139.18/x
3. Step 3: Cross multiply
   3,907.50x = 5,392.53 × 2,139.18
4. Step 4: Simplify right side
   3,907.50x = 11,535,592.33
5. Step 5: Solve for x
   x = 11,535,592.33/3,907.50
6. Step 6: Final answer
   x = 2,952.17