Finding the Fourth Proportional to 3,418.89, 5,120.07 and 1,953.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,418.89 : 5,120.07 = 1,953.60 : x
2. Step 2: Convert to fraction form
   3,418.89/5,120.07 = 1,953.60/x
3. Step 3: Cross multiply
   3,418.89x = 5,120.07 × 1,953.60
4. Step 4: Simplify right side
   3,418.89x = 10,002,568.75
5. Step 5: Solve for x
   x = 10,002,568.75/3,418.89
6. Step 6: Final answer
   x = 2,925.68