Finding the Fourth Proportional to 1,921.98, 2,650.59 and 1,258.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,921.98 : 2,650.59 = 1,258.59 : x
2. Step 2: Convert to fraction form
   1,921.98/2,650.59 = 1,258.59/x
3. Step 3: Cross multiply
   1,921.98x = 2,650.59 × 1,258.59
4. Step 4: Simplify right side
   1,921.98x = 3,336,006.07
5. Step 5: Solve for x
   x = 3,336,006.07/1,921.98
6. Step 6: Final answer
   x = 1,735.71