Finding the Fourth Proportional to 1,018.98, 1,405.80 and 626.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.98 : 1,405.80 = 626.04 : x
2. Step 2: Convert to fraction form
   1,018.98/1,405.80 = 626.04/x
3. Step 3: Cross multiply
   1,018.98x = 1,405.80 × 626.04
4. Step 4: Simplify right side
   1,018.98x = 880,087.03
5. Step 5: Solve for x
   x = 880,087.03/1,018.98
6. Step 6: Final answer
   x = 863.69