Finding the Fourth Proportional to 2,415.34, 3,625.57 and 2,139.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,415.34 : 3,625.57 = 2,139.48 : x
2. Step 2: Convert to fraction form
   2,415.34/3,625.57 = 2,139.48/x
3. Step 3: Cross multiply
   2,415.34x = 3,625.57 × 2,139.48
4. Step 4: Simplify right side
   2,415.34x = 7,756,834.50
5. Step 5: Solve for x
   x = 7,756,834.50/2,415.34
6. Step 6: Final answer
   x = 3,211.49