Finding the Fourth Proportional to 1,028.30, 1,417.59 and 635.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,028.30 : 1,417.59 = 635.10 : x
2. Step 2: Convert to fraction form
   1,028.30/1,417.59 = 635.10/x
3. Step 3: Cross multiply
   1,028.30x = 1,417.59 × 635.10
4. Step 4: Simplify right side
   1,028.30x = 900,311.41
5. Step 5: Solve for x
   x = 900,311.41/1,028.30
6. Step 6: Final answer
   x = 875.53