Finding the Fourth Proportional to 1,636.89, 2,258.78 and 973.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636.89 : 2,258.78 = 973.97 : x
2. Step 2: Convert to fraction form
   1,636.89/2,258.78 = 973.97/x
3. Step 3: Cross multiply
   1,636.89x = 2,258.78 × 973.97
4. Step 4: Simplify right side
   1,636.89x = 2,199,983.96
5. Step 5: Solve for x
   x = 2,199,983.96/1,636.89
6. Step 6: Final answer
   x = 1,344.00