Finding the Fourth Proportional to 2,504.11, 3,455.72 and 1,385.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,504.11 : 3,455.72 = 1,385.15 : x
2. Step 2: Convert to fraction form
   2,504.11/3,455.72 = 1,385.15/x
3. Step 3: Cross multiply
   2,504.11x = 3,455.72 × 1,385.15
4. Step 4: Simplify right side
   2,504.11x = 4,786,690.56
5. Step 5: Solve for x
   x = 4,786,690.56/2,504.11
6. Step 6: Final answer
   x = 1,911.54