Finding the Fourth Proportional to 2,620.52, 3,931.55 and 1,059.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.52 : 3,931.55 = 1,059.73 : x
2. Step 2: Convert to fraction form
   2,620.52/3,931.55 = 1,059.73/x
3. Step 3: Cross multiply
   2,620.52x = 3,931.55 × 1,059.73
4. Step 4: Simplify right side
   2,620.52x = 4,166,381.48
5. Step 5: Solve for x
   x = 4,166,381.48/2,620.52
6. Step 6: Final answer
   x = 1,589.91