Finding the Fourth Proportional to 1,019.83, 1,407.62 and 626.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.83 : 1,407.62 = 626.63 : x
2. Step 2: Convert to fraction form
   1,019.83/1,407.62 = 626.63/x
3. Step 3: Cross multiply
   1,019.83x = 1,407.62 × 626.63
4. Step 4: Simplify right side
   1,019.83x = 882,049.69
5. Step 5: Solve for x
   x = 882,049.69/1,019.83
6. Step 6: Final answer
   x = 864.90