Finding the Fourth Proportional to 2,620.76, 3,931.41 and 889.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.76 : 3,931.41 = 889.52 : x
2. Step 2: Convert to fraction form
   2,620.76/3,931.41 = 889.52/x
3. Step 3: Cross multiply
   2,620.76x = 3,931.41 × 889.52
4. Step 4: Simplify right side
   2,620.76x = 3,497,067.82
5. Step 5: Solve for x
   x = 3,497,067.82/2,620.76
6. Step 6: Final answer
   x = 1,334.37