Finding the Fourth Proportional to 1,636.50, 2,258.51 and 938.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636.50 : 2,258.51 = 938.02 : x
2. Step 2: Convert to fraction form
   1,636.50/2,258.51 = 938.02/x
3. Step 3: Cross multiply
   1,636.50x = 2,258.51 × 938.02
4. Step 4: Simplify right side
   1,636.50x = 2,118,527.55
5. Step 5: Solve for x
   x = 2,118,527.55/1,636.50
6. Step 6: Final answer
   x = 1,294.55