Finding the Fourth Proportional to 1,426.69, 2,138.87 and 635.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.69 : 2,138.87 = 635.47 : x
2. Step 2: Convert to fraction form
   1,426.69/2,138.87 = 635.47/x
3. Step 3: Cross multiply
   1,426.69x = 2,138.87 × 635.47
4. Step 4: Simplify right side
   1,426.69x = 1,359,187.72
5. Step 5: Solve for x
   x = 1,359,187.72/1,426.69
6. Step 6: Final answer
   x = 952.69