Finding the Fourth Proportional to 1,635.10, 2,256.26 and 926.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,635.10 : 2,256.26 = 926.89 : x
2. Step 2: Convert to fraction form
   1,635.10/2,256.26 = 926.89/x
3. Step 3: Cross multiply
   1,635.10x = 2,256.26 × 926.89
4. Step 4: Simplify right side
   1,635.10x = 2,091,294.56
5. Step 5: Solve for x
   x = 2,091,294.56/1,635.10
6. Step 6: Final answer
   x = 1,279.00