Finding the Fourth Proportional to 2,258.90, 3,117.01 and 1,264.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,258.90 : 3,117.01 = 1,264.10 : x
2. Step 2: Convert to fraction form
   2,258.90/3,117.01 = 1,264.10/x
3. Step 3: Cross multiply
   2,258.90x = 3,117.01 × 1,264.10
4. Step 4: Simplify right side
   2,258.90x = 3,940,212.34
5. Step 5: Solve for x
   x = 3,940,212.34/2,258.90
6. Step 6: Final answer
   x = 1,744.31