Finding the Fourth Proportional to 2,504.01, 3,455.76 and 1,385.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,504.01 : 3,455.76 = 1,385.20 : x
2. Step 2: Convert to fraction form
   2,504.01/3,455.76 = 1,385.20/x
3. Step 3: Cross multiply
   2,504.01x = 3,455.76 × 1,385.20
4. Step 4: Simplify right side
   2,504.01x = 4,786,928.27
5. Step 5: Solve for x
   x = 4,786,928.27/2,504.01
6. Step 6: Final answer
   x = 1,911.70