Finding the Fourth Proportional to 2,620.51, 3,925.37 and 1,891.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.51 : 3,925.37 = 1,891.51 : x
2. Step 2: Convert to fraction form
   2,620.51/3,925.37 = 1,891.51/x
3. Step 3: Cross multiply
   2,620.51x = 3,925.37 × 1,891.51
4. Step 4: Simplify right side
   2,620.51x = 7,424,867.15
5. Step 5: Solve for x
   x = 7,424,867.15/2,620.51
6. Step 6: Final answer
   x = 2,833.37