Finding the Fourth Proportional to 2,620.86, 3,933.87 and 1,925.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.86 : 3,933.87 = 1,925.57 : x
2. Step 2: Convert to fraction form
   2,620.86/3,933.87 = 1,925.57/x
3. Step 3: Cross multiply
   2,620.86x = 3,933.87 × 1,925.57
4. Step 4: Simplify right side
   2,620.86x = 7,574,942.06
5. Step 5: Solve for x
   x = 7,574,942.06/2,620.86
6. Step 6: Final answer
   x = 2,890.25