Finding the Fourth Proportional to 2,504.12, 3,455.61 and 1,385.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,504.12 : 3,455.61 = 1,385.10 : x
2. Step 2: Convert to fraction form
   2,504.12/3,455.61 = 1,385.10/x
3. Step 3: Cross multiply
   2,504.12x = 3,455.61 × 1,385.10
4. Step 4: Simplify right side
   2,504.12x = 4,786,368.01
5. Step 5: Solve for x
   x = 4,786,368.01/2,504.12
6. Step 6: Final answer
   x = 1,911.40