Finding the Fourth Proportional to 1,635.27, 2,256.89 and 972.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,635.27 : 2,256.89 = 972.49 : x
2. Step 2: Convert to fraction form
   1,635.27/2,256.89 = 972.49/x
3. Step 3: Cross multiply
   1,635.27x = 2,256.89 × 972.49
4. Step 4: Simplify right side
   1,635.27x = 2,194,810.03
5. Step 5: Solve for x
   x = 2,194,810.03/1,635.27
6. Step 6: Final answer
   x = 1,342.17