Finding the Fourth Proportional to 2,103.79, 3,140.89 and 1,607.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.79 : 3,140.89 = 1,607.60 : x
2. Step 2: Convert to fraction form
   2,103.79/3,140.89 = 1,607.60/x
3. Step 3: Cross multiply
   2,103.79x = 3,140.89 × 1,607.60
4. Step 4: Simplify right side
   2,103.79x = 5,049,294.76
5. Step 5: Solve for x
   x = 5,049,294.76/2,103.79
6. Step 6: Final answer
   x = 2,400.09