Finding the Fourth Proportional to 1,636.30, 2,258.91 and 1,077.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636.30 : 2,258.91 = 1,077.13 : x
2. Step 2: Convert to fraction form
   1,636.30/2,258.91 = 1,077.13/x
3. Step 3: Cross multiply
   1,636.30x = 2,258.91 × 1,077.13
4. Step 4: Simplify right side
   1,636.30x = 2,433,139.73
5. Step 5: Solve for x
   x = 2,433,139.73/1,636.30
6. Step 6: Final answer
   x = 1,486.98